Mental Math

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Mental Math. A Life Long Skill. Mental Math # 1. 7000 + 300 + 40 + 3 = 9000 + 70 + 3 = 2000 + 50 + 400 + 4 = 50 + 4000 + 7 + 300 = 5 x 1000 + 3 x 100 + 9 x 10 + 2 x 1 = 4 x 100 + 8 x 1 + 5 x 1000 = 50 000 + 3000 + 20 + 7 = 500 + 300 + 40 = 80 + 40 + 20 + 2 = 4000 + 500 + 3000 + 20 =. - PowerPoint PPT Presentation

Transcript of Mental Math

Page 1: Mental Math
Page 2: Mental Math

Mental Math # 11) 7000 + 300 + 40 + 3 =2) 9000 + 70 + 3 =3) 2000 + 50 + 400 + 4 =4) 50 + 4000 + 7 + 300 =5) 5 x 1000 + 3 x 100 + 9 x 10 + 2 x 1

=6) 4 x 100 + 8 x 1 + 5 x 1000 =7) 50 000 + 3000 + 20 + 7 =8) 500 + 300 + 40 =9) 80 + 40 + 20 + 2 =10)4000 + 500 + 3000 + 20 =

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Mental Math # 11) 7000 + 300 + 40 + 3 = 73432) 9000 + 70 + 3 = 90733) 2000 + 50 + 400 + 4 = 24544) 50 + 4000 + 7 + 300 = 43575) 5 x 1000 + 3 x 100 + 9 x 10 + 2 x 1

= 53926) 4 x 100 + 8 x 1 + 5 x 1000 = 54087) 50 000 + 3000 + 20 + 7 = 53 0278) 500 + 300 + 40 = 8409) 80 + 40 + 20 + 2 = 14210)4000 + 500 + 3000 + 20 = 7520

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Mental Math # 21) 500 + 3000 + 70 + 3 =2) 6000 + 700 + 33) 2000 + 500 + 40 + 4 =4) 50 000 + 30 + 7 + 8000 =5) 3 x 10 000 + 1 x 1000 + 9 x 100 +

2 x 10 + 3 x 1 =6) 4 x 1000 + 2 x 1 + 5 x 100 =7) 200 + 300 + 20 + 5 =8) 500 + 500 + 400 + 24 =9) 40 + 60 + 20 + 70 + 30 =10)4200 + 500 + 60 =

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Mental Math # 21) 500 + 3000 + 70 + 3 = 35732) 6000 + 700 + 3 = 67033) 2000 + 500 + 40 + 4 = 25444) 50 000 + 30 + 7 + 8000 = 58 0375) 3 x 10 000 + 1 x 1000 + 9 x 100 +

2 x 10 + 3 x 1 = 31 9236) 4 x 1000 + 2 x 1 + 5 x 100 = 45027) 200 + 300 + 20 + 5 = 5258) 500 + 500 + 400 + 24 = 14249) 40 + 60 + 20 + 70 + 30 = 22010)4200 + 500 + 60 = 4760

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Mental Math # 31) 90 + 7000 + 500 + 6 =2) 60 000 + 400 + 20 + 3 =3) 300 + 700 + 80 + 4 =4) 50 000 + 30 + 7 + 8000 =5) 3 x 1000 + 9 x 100 + 6 x 10 + 2 x 1

=6) 4 x 1000 + 2 x 10 000 + 8 x 100 =7) 20 + 80 + 30 + 5 + 70 =8) 900 + 600 + 400 + 72 + 100 =9) 2000 + 8000 + 700 + 30 =10)5100 + 900 + 70 =

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Mental Math # 31) 90 + 7000 + 500 + 6 = 75962) 60 000 + 400 + 20 + 3 = 60 4233) 300 + 700 + 80 + 4 = 10844) 50 000 + 30 + 7 + 8000 = 58 0375) 3 x 1000 + 9 x 100 + 6 x 10 + 2 x 1 =

39626) 4 x 1000 + 2 x 10 000 + 8 x 100 = 24 8007) 20 + 80 + 30 + 5 + 70 = 2058) 900 + 600 + 400 + 72 + 100 = 20729) 2000 + 8000 + 700 + 30 = 10 73010)5100 + 900 + 70 = 6070

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Mental Math # 41) 20 + 6000 + 400 + 7 =2) 50 000 + 9000 + 200 + 30 =3) 400 + 600 + 3 + 40 =4) 20 000 + 300 + 9 + 4000 =5) 5 x 1000 + 3 x 100 + 7 x 10 + 2 x 1

=6) 7 x 1000 + 8 x 10 000 + 6 x 100 =7) 50 + 90 + 50 + 5 + 10 =8) 300 + 600 + 700 + 42 =9) 4000 + 500 + 500 + 33 =10)3700 + 300 + 76 =

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Mental Math # 41) 20 + 6000 + 400 + 7 = 64272) 50 000 + 9000 + 200 + 30 = 59 2303) 400 + 600 + 3 + 40 = 10434) 20 000 + 300 + 9 + 4000 = 24 3095) 5 x 1000 + 3 x 100 + 7 x 10 + 2 x 1

= 53726) 7 x 1000 + 8 x 10 000 + 6 x 100 =

876007) 50 + 90 + 50 + 5 + 10 = 2058) 300 + 600 + 700 + 42 = 16429) 4000 + 500 + 500 + 33 = 503310)3700 + 300 + 76 = 4076

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Mental Math # 51) 200 + 60 000 + 4 + 70 = 2) 50 + 80 + 90 + 20 + 10 = 3) 400 + 600 + 3000 + 400 = 4) 23 + 300 + 7 = 5) 6 x 1000 + 2 x 100 + 0 x 10 + 2 x 1

= 6) 9 x 1000 + 8 x 10 000 + 6 x 100 +

4 x 10 = 7) 9 + 7 = 8) 90 + 70 = 9) 139 + 7 = 10)390 + 70 =

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Mental Math # 51) 200 + 60 000 + 4 + 70 = 60 2742) 50 + 80 + 90 + 20 + 10 = 2503) 400 + 600 + 3000 + 400 = 44004) 23 + 300 + 7 = 3305) 6 x 1000 + 2 x 100 + 0 x 10 + 2 x 1

= 62026) 9 x 1000 + 8 x 10 000 + 6 x 100 +

4 x 10 = 89 6407) 9 + 7 = 168) 90 + 70 = 1609) 139 + 7 = 14610)390 + 70 = 460

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Mental Math # 61) 500 + 20 + 500 + 80 = 2) 30 + 80 + 70 + 10 + 10 = 3) 200 + 800 + 30 + 400 = 4) 51 + 3000 + 9 = 5) 8 x 1000 + 3 x 100 + 4 x 10 + 4 x 1

= 6) 9 x 10 000 + 8 x 1 + 6 x 1000 = 7) 7 + 5 = 8) 70 + 50 = 9) 127 + 5 = 10)330 + 37 =

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Mental Math # 61) 500 + 20 + 500 + 80 = 11002) 30 + 80 + 70 + 10 + 10 = 2003) 200 + 800 + 30 + 400 = 14304) 51 + 3000 + 9 = 30605) 8 x 1000 + 3 x 100 + 4 x 10 + 4 x 1

= 83446) 9 x 10 000 + 8 x 1 + 6 x 1000 = 96

0087) 7 + 5 = 128) 70 + 50 = 1209) 127 + 5 = 13210)330 + 37 = 367

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Mental Math # 71) 48 + 21 =2) 53 + 34 = 3) 34 + 52 =4) 456 + 120 = 5) 438 + 340 =6) 629 + 310 =7) 400 + 231 =8) 456 + 42 =9) 381 + 405 =10)705 + 220 =

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Mental Math # 71) 48 + 21 = 692) 53 + 34 = 873) 34 + 52 = 864) 456 + 120 = 5765) 438 + 340 = 7786) 629 + 310 = 9397) 400 + 231 = 6318) 456 + 42 = 4989) 381 + 405 = 78610)705 + 220 = 925

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Mental Math # 81) 430 + 53 = 2) 510 + 87 = 3) 349 + 220 = 4) 456 + 440 = 5) 352 + 527 = 6) 600 + 350 = 7) 434 + 231 = 8) 156 + 420 = 9) 321 + 45 = 10)615 + 224 =

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Mental Math # 81) 430 + 53 = 4832) 510 + 87 = 5973) 349 + 220 = 5694) 456 + 440 = 8965) 352 + 527 = 8796) 600 + 350 = 9507) 434 + 231 = 6658) 156 + 420 = 5769) 321 + 45 = 36610)615 + 224 = 839

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Mental Math # 91) 974 + 23 = 2) 320 + 29 = 3) 341 + 208 = 4) 677 + 320 = 5) 425 + 563 = 6) 60 + 322 = 7) 400 + 231 = 8) 424 + 424 = 9) 333 + 425 = 10)610 + 220 =

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Mental Math # 91) 974 + 23 = 9972) 320 + 29 = 3493) 341 + 208 = 5494) 677 + 320 = 9975) 425 + 563 = 9886) 60 + 322 = 3827) 400 + 231 = 6318) 424 + 424 = 8489) 333 + 425 = 75810)610 + 220 = 830

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Mental Math # 101) 543 + 253 = 2) 841 + 200 = 3) 128 + 331 = 4) 415 + 363 = 5) 52 + 315 = 6) 400 + 200 + 387 = 7) 398 + 502 = 8) 260 + 540 = 9) 390 + 208 = 10) 111 + 111 + 111 =

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Mental Math # 101) 543 + 253 = 7962) 841 + 200 = 10413) 128 + 331 = 4594) 415 + 363 = 7785) 52 + 315 = 3676) 400 + 200 + 387 = 9877) 398 + 502 = 9008) 260 + 540 = 8009) 390 + 208 = 59810) 111 + 111 + 111 = 333

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Mental Math # 111) Five and three tenths = 2) Thirty two and four hundredths = 3) Seventy-seven thousandths = 4) Two hundred four and five

hundredths = 5) Nine hundredths = 6) 4 + 0.2 = 7) 30 + 5 + 0.9 + 0.07 = 8) 200 + 0.8 = 9) (5 x 1) + (2 x 0.1) + (4 x 0.01) = 10) 3 x 100 + 6 x 0.01 =

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Mental Math # 111) Five and three tenths = 5.32) Thirty two and four hundredths =

32.043) Seventy-seven thousandths = 0.0774) Two hundred four and five

hundredths = 204.055) Nine hundredths = 0.096) 4 + 0.2 = 4.27) 30 + 5 + 0.9 + 0.07 = 35.978) 200 + 0.8 = 200.89) (5 x 1) + (2 x 0.1) + (4 x 0.01) = 5.2410) 3 x 100 + 6 x 0.01 = 300.06

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Mental Math # 121) Nine and three hundredths = 2) Thirty two and four tenths = 3) Seven thousandths = 4) Three hundred and fifteen

thousandths = 5) Nine hundredths = 6) 5 + 0.2 + 0.06 = 7) 300 + 50 + 0.9 + 0.04 = 8) 20 + 0.08 + 3 = 9) (5 x 0.001) + (2 x 0.01) + (4 x 0.1) = 10) 3 x 100 + 6 x 0.1 + 4 x 1 =

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Mental Math # 121) Nine and three hundredths = 9.032) Thirty two and four tenths = 32.43) Seven thousandths = 0.0074) Three hundred and fifteen

thousandths = 300.0155) Nine hundredths = 0.096) 5 + 0.2 + 0.06 = 5.267) 300 + 50 + 0.9 + 0.04 = 350.948) 20 + 0.08 + 3 = 23.089) (5 x 0.001) + (2 x 0.01) + (4 x 0.1) =

0.42510) 3 x 100 + 6 x 0.1 + 4 x 1 = 304.6

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Mental Math # 131)

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Mental Math # 131)

One and four tenths or

1.4

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Fifty-threehundredths or

0.53

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One and threehundredths or

1.03

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One andTwo tenths or

1.2

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One and thirty-four

thousandths or 1. 034

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Five thousandths or 0.005

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One and thirteen thousandths or

1.013

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Two and one hundred forty-

two thousandths or 2.142

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Twenty-two thousandths or

0.022

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One and five hundredths or

1.05

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Mental Math # 141) 3.25 or 3.5 2) 2.000 or 2.0013) 0.98 or 0.89 =4) 98.9 or 98.195) 10.01 or 10.010 =6) 6.6 or 6.607) Two hundredths or two thousandths

=8) 1.9 or 0.9999) 1 or 0.95 =10) 636 or 663 =

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Mental Math # 141) 3.25 or 3.5 2) 2.000 or 2.0013) 0.98 or 0.89 4) 98.9 or 98.195) 10.01 or 10.010 6) 6.6 or 6.607) Two hundredths or two thousandths 8) 1.9 or 0.9999) 1 or 0.95 10) 636 or 663

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Mental Math # 151) 3.25 rounded to the nearest tenth =2) 234.9 rounded to the nearest whole

number =3) 1.984 rounded to the nearest hundredth =4) 48.9 rounded to the nearest ten =5) 10.08 rounded to the nearest tenth =6) 6.6 rounded to the nearest whole number =7) 1465.9 rounded to the nearest hundred =8) 7.3 rounded to the nearest whole number =9) 0.6544 rounded to the nearest thousandths

=10) 1.95 rounded to the nearest tenth =

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Mental Math # 151) 3.25 rounded to the nearest tenth = 3.32) 234.9 rounded to the nearest whole number =

2353) 1.984 rounded to the nearest hundredth = 1.984) 48.9 rounded to the nearest ten = 505) 10.08 rounded to the nearest tenth = 10.16) 6.6 rounded to the nearest whole number = 77) 1465.9 rounded to the nearest hundred = 15008) 7.3 rounded to the nearest whole number = 79) 0.6544 rounded to the nearest thousandths =

0.65410) 1.95 rounded to the nearest tenth = 2

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Mental Math # 161) 10 x 30 =2) 3 x 500 =3) 2.4 x 2 =4) 5 x 80 =5) 100 x 38 =6) 6.2 x 2 = 7) 90 x 50 =8) 300 x 20 =9) 10 x 96 =10) 1.25 x 3 =

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Mental Math # 161) 10 x 30 = 3002) 3 x 500 = 15003) 2.4 x 2 = 4.84) 5 x 80 = 4005) 100 x 38 = 38006) 6.2 x 2 = 12.47) 90 x 50 = 45008) 300 x 20 = 60009) 10 x 96 = 96010) 1.25 x 3 = 3.75

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Mental Math # 171) 100 x 93 = 2) 30 x 70 = 3) 0.9 x 2 = 4) 50 x 60 = 5) 1 x 3.8 = 6) 10 x 3.8 = 7) 200 x 50 = 8) 30 x 40 = 9) 10 x 180 = 10) 1.99 x 2 =

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Mental Math # 171) 100 x 93 = 93002) 30 x 70 = 21003) 0.9 x 2 = 1.84) 50 x 60 = 30005) 1 x 3.8 = 3.86) 10 x 3.8 = 387) 200 x 50 = 10 0008) 30 x 40 = 12009) 10 x 180 = 180010) 1.99 x 2 = 3.98

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Mental Math # 181) 30 x 90 = 2) 5 x $9.13 =3) 3 x $7.97 =4) 7 x $2.06 = 5) $5.13 x 6 = 6) 5 x $3.89 = 7) 10 x 3.8 = 8) 300 x 50 = 9) 10 x 340 = 10) $1.98 x 2 =

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Mental Math # 181) 30 x 90 = 27002) 5 x $9.13 = $453) 3 x $7.97 = $244) 7 x $2.06 = $14 or 14.425) $5.13 x 6 = $306) 5 x 3.89 = $207) 10 x 3.8 = $388) 300 x 50 = 15 0009) 10 x 340 = 340010) $1.98 x 2 = $3.96 or $4.00

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Mental Math # 191) 20 x 700 = 2) 9 x $4.21 = 3) 9 x $0.97 =4) 5 x $3.36 = 5) $5.13 x 6 =6) 5 x 3.09 = 7) 1 x 5.9 =8) 10 x 5.9 = 9) 100 x 66 = 10) $1.05 x 3 =

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Mental Math # 191) 20 x 700 = 14 0002) 9 x $4.21 = $363) 9 x $0.97 = $94) 5 x $3.36 = $15 5) $5.13 x 6 = $306) 5 x 3.09 = $15 or 15.457) 1 x 5.9 = 5.98) 10 x 5.9 = 599) 100 x 66 = 660010) $1.05 x 3 = $3.15 or $3.00

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Mental Math # 201) 10 x 7.5 = 2) 0.9 x 10 = 3) 100 x 0.97 = 4) 10 x 3.36 = 5) 5.13 x 100 = 6) 100 x 30.9 = 7) 10 x 0.018 = 8) 1000 x 5.9 = 9) 6.6 10 = 10) 1.05 x 10 =

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Mental Math # 201) 10 x 7.5 = 752) 0.9 x 10 = 93) 100 x 0.97 = 974) 10 x 3.36 = 33.65) 5.13 x 100 = 5136) 100 x 30.9 = 30907) 10 x 0.018 = 0.188) 1000 x 5.9 = 59009) 6.6 10 = 0.6610) 1.05 x 10 = 10.5

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Mental Math # 211) 100 x 39.1 = 2) 9.3 x 10 = 3) 10 x 0.93 = 4) 100 x 6.3 = 5) 3.4 10 = 6) 5.13 x 10 = 7) 10 x 30.9 = 8) 10 x 0.001 = 9) 1000 x 0.5 = 10)10.5 100 =

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Mental Math # 211) 100 x 39.1 = 39102) 9.3 x 10 = 933) 10 x 0.93 = 9.34) 100 x 6.3 = 6305) 3.4 10 = 0.346) 5.13 x 10 = 51.37) 10 x 30.9 = 3098) 10 x 0.001 = 0.019) 1000 x 0.5 = 50010)10.5 100 = 0.105

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Mental Math # 221) 45.1 10 = 2) 9.3 10 = 3) 67 10 = 4) 6.3 100 = 5) 3400 100 =6) 51.3 10 = 7) 10 x 39.1 =8) 413.1 100 =9) 2.5 1000 = 10)750.5 100 =

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Mental Math # 221) 45.1 10 = 4.512) 9.3 10 = 0.933) 67 10 = 6.74) 6.3 100 = 0.0635) 3400 100 = 346) 51.3 10 = 5.137) 10 x 39.1 = 3918) 413.1 100 =4.1319) 2.5 1000 = 0.002510)750.5 100 = 7.505

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Mental Math # 231) 83 100 = 2) 4.7 x 10 = 3) 69.2 10 = 4) 16.3 100 = 5) 30.4 10 = 6) 933 10 = 7) 10 x 92.1 = 8) 4 1000 =9) 2.5 100 = 10)5.2 10 =

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Mental Math # 231) 83 100 = 0.832) 4.7 x 10 = 473) 69.2 10 = 6.924) 16.3 100 = 0.1635) 30.4 10 = 3.046) 933 10 = 93.37) 10 x 92.1 = 9218) 4 1000 =0.0049) 2.5 100 = 0.02510)5.2 10 = 0.52

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Mental Math # 241) 7.7 100 = 2) 40 x 300 = 3) 500 + 30 + 6000 + 2 = 4) 6 + 8 = 5) 156 + 8 =6) 200 + 400 + 53 =7) 3 x 10 + 6 x 1000 + 2 x 1 = 8) 46.45 rounded to the nearest tenth = 9) Five hundred and four thousandths = 10)Which is larger 98.9 or 98.199 =

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Mental Math # 241) 7.7 100 = 0.0772) 40 x 300 = 12 0003) 500 + 30 + 6000 + 2 = 65324) 6 + 8 = 145) 156 + 8 = 1646) 200 + 400 + 53 = 6537) 3 x 10 + 6 x 1000 + 2 x 1 = 60328) 46.45 rounded to the nearest tenth =

46.59) Five hundred and four thousandths =

500.00410)Which is larger 98.9 or 98.199 = 98.9

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Mental Math # 251) 822.4 100 = 2) 50 x 30 = 3) 5 + 800 + 60 + 2000 = 4) 7 + 5 = 5) 335 + 7 = 6) 2 x $3.99= 7) 3 x 100 + 6 x 10 + 2 x 1000 = 8) 8.4488 rounded to the nearest hundredth

= 9) ten and thirteen thousandths = 10) =

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Mental Math # 251) 822.4 100 = 8.2242) 50 x 30 = 15003) 5 + 800 + 60 + 2000 = 28654) 7 + 5 = 125) 335 + 7 = 3426) 2 x $3.99= $7.987) 3 x 100 + 6 x 10 + 2 x 1000 = 23608) 8.4488 rounded to the nearest hundredth

= 8.459) ten and thirteen thousandths = 10.01310) = 1.04

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Mental Math # 261. 105 cm = ____ m2. 2 L = _____ mL3. 5000 m = _____ km4. 3.4 mm = _____ cm5. 90 mL = _____ L6. 600 g = _____ kg7. 1 mg = _____ g8. 3 km = _____ m9. 0.01 g = _____ mg10. 20 m = _____ cm

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Mental Math # 261. 105 cm = 1.05 m 2. 2 L = 2000 mL3. 5000 m = 5 km4. 3.4 mm = 0.34 cm5. 90 mL = 0.09 L6. 600 g = 0.6 kg7. 1 mg = 0.001 g8. 3 km = 3000 m9. 0.01 g = 10 mg10. 20 m = 2000 cm

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Mental Math # 271. 6 L = _____ mL2. 3700 m = _____km and _____m3. 59 km = _____ m4. 3.4 cm = _____mm5. 345 mL = _____L6. 69 mg = _____ g7. 1112 g = _____kg8. 9 km = _____ m9. 0.08 g = _____ mg10. 2160 m = _____ km and _____m

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Mental Math # 271. 6 L = 6000 mL2. 3700 m = 3 km and 700 m3. 59 km = 59 000 m 4. 3.4 cm = 34 mm5. 345 mL = 0.345 L6. 69 mg = 0.069 g7. 1112 g = 1.112 kg8. 9 km = 9000 m9. 0.08 g = 80 mg10. 2160 m = 2 km and 160 m

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Mental Math # 281. 3900 mm = _____ m2. 4321 m = _____ km and _____ m3. 5900 mL = _____ L and _____ mL 4. 47 cm = _____ mm5. 805 mL = _____ L6. 6 g = _____ mg7. 4 kg = _____ g8. 9 km = _____ hm9. 8 g = _____ dg10. 2002 m = _____ km and _____ m

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Mental Math # 281. 3900 mm = 3.9 m2. 4321 m = 4 km and 321 m3. 5900 mL = 5 L and 900 mL 4. 47 cm = 470 mm5. 805 mL = 0.805 L6. 6 g = 6000 mg7. 4 kg = 4000 g8. 9 km = 90 hm9. 8 g = 80 dg10. 2002 m = 2 km and 2 m

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Mental Math Practice # 11. Have $10, spend $1.25 = 2. Have $10, spend $3.45 =3. Have $5, spend $2.30 =4. Have $20, spend $10.02 =5. Have $5, spend $2.89 =6. Have $20, spend $14.37 =7. Have $20, spend $18.50 =8. Have $10, spend $3.90 =9. Have $5, spend $0.78 =10.Have $10, spend $8.10 =

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Mental Math Practice # 11. Have$10, spend $1.25 = $8.752. Have $10, spend $3.45 =$6.553. Have $5, spend $2.30 = $2.704. Have $20, spend $10.02 = $9.985. Have $5, spend $2.89 = $2.116. Have $20, spend $14.37 = $5.637. Have $20, spend $18.50 = $1.508. Have $10, spend $3.90 = $6.109. Have $5, spend $0.78 = $4.2210.Have $10, spend $8.10 = $1.90

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Mental Math Practice # 21. Have $10, spend $2.75 = 2. Have $10, spend $3.55 =3. Have $5, spend $3.90 =4. Have $20, spend $11.97 =5. Have $5, spend $2.75 =6. Have $20, spend $15.43 =7. Have $20, spend $16.50 =8. Have $10, spend $1.70 =9. Have $5, spend $0.63 =10.Have $10, spend $7.20 =

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Mental Math Practice # 21. Have $10, spend $2.75 = $7.252. Have $10, spend $3.55 = $6.453. Have $5, spend $3.90 = $1.104. Have $20, spend $11.97 = $8.035. Have $5, spend $2.75 = $2.256. Have $20, spend $15.43 = $4.577. Have $20, spend $16.50 = $3.508. Have $10, spend $1.70 = $8.309. Have $5, spend $0.63 = $4.3710.Have $10, spend $7.20 = $2.80

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Mental Math # 291. Have $10, spend $2.80 = 2. Have $10, spend $5.35 =3. Have $5, spend $1.40 =4. Have $20, spend $13.87 =5. Have $5, spend $2.75 =6. Have $20, spend $15.33 =7. Have $20, spend $17.50 =8. Have $10, spend $4.45 =9. Have $5, spend $0.71 =10.Have $10, spend $8.20 =

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Mental Math # 291. Have $10, spend $2.80 = $7.202. Have $10, spend $5.35 = $4.653. Have $5, spend $1.40 = $3.604. Have $20, spend $13.87 = $6.135. Have $5, spend $2.75 = $2.256. Have $20, spend $15.33 = $4.677. Have $20, spend $17.50 = $2.508. Have $10, spend $4.45 = $5.559. Have $5, spend $0.71 = $4.2910.Have $10, spend $8.20 = $1.80

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Mental Math # 301. Have $10, spend $3.35 =2. Have $10, spend $7.40 = 3. Have $5, spend $0.84 = 4. Have $20, spend $18.99 = 5. Have $5, spend $2.25 = 6. Have $20, spend $16.29 = 7. Have $20, spend $18.50 = 8. Have $10, spend $4.95 = 9. Have $5, spend $0.30 = 10.Have $10, spend $6.70 =

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Mental Math # 301. Have $10, spend $3.35 = $6.652. Have $10, spend $7.40 = $2.603. Have $5, spend $0.84 = $4.164. Have $20, spend $18.99 = $1.015. Have $5, spend $2.25 = $2.756. Have $20, spend $16.29 = $3.717. Have $20, spend $18.50 = $1.508. Have $10, spend $4.95 = $5.059. Have $5, spend $0.30 = $4.7010.Have $10, spend $6.70 = $3.30

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Mental Math # 311. Have $10, spend $8.30 = 2. Have $10, spend $1.41 = 3. Have $5, spend $0.34 = 4. $3.99 + ? = $10.005. 5.2 + ? = 106. Have $20, spend $11.50 =7. Have $20, spend $7.68 = 8. 0.74 + ? = 59. ? + 4.085 = 510.17.10 + ? = 20

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Mental Math # 311. Have $10, spend $8.30 = $1.702. Have $10, spend $1.41 = $8.593. Have $5, spend $0.34 = $4.664. $3.99 + $6.01 = $10.005. 5.2 + 4.8 = 106. Have $20, spend $11.50 = $8.507. Have $20, spend $7.68 = $12.328. 0.74 + 4.26 = 59. 0.915 + 4.085 = 510.17.1 + 2.9 = 20

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Mental Math # 321. Have $10, spend $5.15 = 2. Have $10, spend $3.57 = 3. Have $5, spend $1.92 = 4. $4.61 + ? = $10.005. 3.7 + ? = 106. Have $20, spend $12.75 = 7. Have $20, spend $9.50 = 8. 0.31 + ? = 19. ? + 2.425 = 510.15.5 + ? = 20

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Mental Math # 321. Have $10, spend $5.15 = $4.852. Have $10, spend $3.57 = $6.433. Have $5, spend $1.92 = $3.084. $4.61 + $5.39 = $10.005. 3.7 + 6.3 = 106. Have $20, spend $12.75 = $7.257. Have $20, spend $9.50 = $10.508. 0.31 + 0.69 = 19. 2.575 + 2.425 = 510.15.5 + 4.5 = 20

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Mental Math # 331. 20 + 14 =2. 55 + 43 = 3. 38 + 26 = 4. 65 + 27 = 5. 78 + 135 = 6. 23 + 59 = 7. 48 + 24 = 8. 45 + 48 = 9. 36 + 47 =10.263 + 43 =

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Mental Math # 331. 20 + 14 = 342. 55 + 43 = 983. 38 + 26 = 644. 65 + 27 = 925. 78 + 135 = 2136. 23 + 59 = 827. 48 + 24 = 728. 45 + 48 = 939. 36 + 47 = 8310.263 + 43 = 306

Page 90: Mental Math

Mental Math # 341. 46 + 27 = 2. 35 + 48 = 3. 18 + 73 = 4. 94 + 26 = 5. 82 + 225 = 6. 77 + 19 = 7. 49 + 49 = 8. 23 + 45 = 9. 32 + 41 + 60 = 10.227 + 63 =

Page 91: Mental Math

Mental Math # 341. 46 + 27 = 732. 35 + 48 = 833. 18 + 73 = 914. 94 + 26 = 1205. 82 + 225 = 3076. 77 + 19 = 967. 49 + 49 = 988. 23 + 45 = 689. 32 + 41 + 60 = 13310.227 + 63 = 290

Page 92: Mental Math

Mental Math # 351. 30 + 25 + 70 = 2. 35 + 40 + 60 + 20 = 3. 50 + 95 + 50 = 4. 10 + 75 + 50 + 50 + 25 = 5. 90 + 25 + 75 + 10 = 6. 85 + 25 + 25 + 15 = 7. 20 + 80 + 55 + 30 + 45 = 8. 35 + 20 + 90 + 65 = 9. 20 + 40 + 60 + 180 = 10.300 + 700 + 600 =

Page 93: Mental Math

Mental Math # 351. 30 + 25 + 70 = 1252. 35 + 40 + 60 + 20 = 1553. 50 + 95 + 50 = 1954. 10 + 75 + 50 + 50 + 25 = 2105. 90 + 25 + 75 + 10 = 2006. 85 + 25 + 25 + 15 = 1507. 20 + 80 + 55 + 30 + 45 = 2308. 35 + 20 + 90 + 65 = 2109. 20 + 40 + 60 + 180 = 30010.300 + 700 + 600 = 1600

Page 94: Mental Math

Mental Math # 361. 50 + 25 + 75 = 2. 35 + 70 + 30 + 65 + 10= 3. 20 + 50 + 150 = 4. 70 + 10 + 30 + 60 + 40 = 5. 90 + 55 + 45 + 10 + 80 = 6. 25 + 25 + 25 + 50 = 7. 20 + 80 + 55 + 30 + 45 = 8. 100 + 200 + 900 + 65 = 9. 200 + 50 + 130 + 50 = 10.200 + 70 + 800 + 30 =

Page 95: Mental Math

Mental Math # 361. 50 + 25 + 75 = 1502. 35 + 70 + 30 + 65 + 10= 2103. 20 + 50 + 150 = 2204. 70 + 10 + 30 + 60 + 40 = 2105. 90 + 55 + 45 + 10 + 80 = 2806. 25 + 25 + 25 + 50 = 1257. 20 + 80 + 55 + 30 + 45 = 2308. 100 + 200 + 900 + 65 = 12659. 200 + 50 + 130 + 50 = 43010.200 + 70 + 800 + 30 = 1100

Page 96: Mental Math

Mental Math # 371. 29 + 75 =2. 56 + 52= 3. 25 + 54 =4. 175 + 24 = 5. 90 + 55 = 6. 26 + 99 = 7. 98 + 79 = 8. 125 + 77 = 9. 258 + 50 = 10.215 + 90 =

Page 97: Mental Math

Mental Math # 371. 29 + 75 = 1042. 56 + 52= 1083. 25 + 54 = 794. 175 + 24 = 1995. 90 + 55 = 1456. 26 + 99 = 1257. 98 + 79 = 1778. 125 + 77 = 2029. 258 + 50 = 30810.215 + 90 = 305

Page 98: Mental Math

Mental Math # 381. 28 + 75 =2. 225 + 76 = 3. 25 + 98 = 4. 198 + 28 = 5. 390 + 38 = 6. 87 + 198 = 7. 99 + 209 = 8. 175 + 27 = 9. 325 + 79 = 10.50 + 158 =

Page 99: Mental Math

Mental Math # 381. 28 + 75 = 1032. 225 + 76 = 3013. 25 + 98 = 1234. 198 + 28 = 2265. 390 + 38 = 4286. 87 + 198 = 2857. 99 + 209 = 3088. 175 + 27 = 2029. 325 + 79 = 40410.50 + 158 = 208

Page 100: Mental Math

Mental Math # 391. 228 2 = 2. 255 5 =3. 339 3 = 4. 168 4 = 5. 300 50 = 6. 726 6 = 7. 990 90 = 8. 200 5 =9. 714 7 = 10.342 3 =

Page 101: Mental Math

Mental Math # 391. 228 2 = 1142. 255 5 = 513. 339 3 = 1134. 168 4 = 425. 300 50 = 66. 726 6 = 1217. 990 90 = 118. 200 5 = 409. 714 7 = 10210.342 3 = 114

Page 102: Mental Math

Mental Math # 401. 530 5 = 2. 369 3 = 3. 322 2 = 4. 464 4 = 5. 600 30 = 6. 816 8 = 7. 8000 40 = 8. 260 5 = 9. 147 7 = 10.189 9 =

Page 103: Mental Math

Mental Math # 401. 530 5 = 1062. 369 3 = 1233. 322 2 = 1614. 464 4 = 1165. 600 30 = 206. 816 8 = 1027. 8000 40 = 2008. 260 5 = 529. 147 7 = 2110.189 9 = 21

Page 104: Mental Math
Page 105: Mental Math

Mental Math # 11) 125 + 35 =2) 2000 + 50 + 400 + 4 =3) 4.2 + 3 + 0.8 =4) 23 =5) $10.00 - $3.85 =6) 65 + ? = 1007) 90 x 50 =8) 135 5 =9) 100 x 0 .15 =10) 60 =

Page 106: Mental Math

Mental Math # 11) 125 + 35 = 1602) 2000 + 50 + 400 + 4 = 24543) 4.2 + 3 + 0.8 = 84) 23 = 85) $10.00 - $3.85 = $6.156) 65 + 35 = 1007) 90 x 50 = 45008) 135 5 = 279) 100 x 0.15 = 1510) 60 = 1

Page 107: Mental Math

Mental Math # 21) 375 + 45 =2) 200 + 60 + 140 =3) 31 = 4) 2.7 + 3 + 1.3 =5) You give $5 for a purchase costing

$2.55. What is your change?6) ? + 275 = 10007) 2800 in scientific notation is =8) 284 2 =9) 2.9 x 100 =10) 37 10 =

Page 108: Mental Math

Mental Math # 21) 375 + 45 = 4202) 200 + 60 + 140 = 4003) 31 = 34) 2.7 + 3 + 1.3 = 75) You give $5 for a purchase costing

$2.55. What is your change? $2.456) 725 + 275 = 10007) 2800 in scientific notation is = 2.8 x

103

8) 284 2 = 1429) 2.9 x 100 = 29010) 38.9 10 = 3.89

Page 109: Mental Math

Mental Math # 31) 530 + 28 =2) 2100 + 500 + 230 =3) 3.5 + 3 + 1.5 =4) 234.5 in scientific notation =5) You give $5 for a purchase costing

$3.30. What is your change?6) 300 + 300 + ? = 10007) 40 x 500 =8) 396 3 =9) 5.3 m equals ___ cm =10) 82.9 10 =

Page 110: Mental Math

Mental Math # 31) 530 + 28 = 5582) 2100 + 500 + 230 = 28303) 3.5 + 3 + 1.5 = 84) 234.5 in scientific notation = 2.345 x

102

5) You give $5 for a purchase costing $3.30. What is your change? $1.70

6) 300 + 300 + 400 = 10007) 40 x 500 = 20 0008) 396 3 = 1329) 5.3 m equals 530 cm 10) 82.9 10 = 8.29

Page 111: Mental Math

Mental Math # 41) 200 + 6000 + 3 + 70 = 2) 50 + 3100 + 700 =3) 32 =4) 9 + 40.3 + 0.5 =5) $10.00 - $6.75 =6) 35 + 25 + ? = 1007) 3000 x 20 =8) 350 5 =9) 237 100 =

Page 112: Mental Math

Mental Math # 41) 200 + 6000 + 3 + 70 = 62732) 50 + 3100 + 700 = 38503) 32 = 94) 9 + 40.3 + 0.5 = 49.85) $10.00 - $6.75 = $3.256) 35 + 25 + 40 = 1007) 3000 x 20 = 60 0008) 350 5 = 709) 237 100 = 2.3710)2.304

Page 113: Mental Math

Mental Math # 51) 285 + 65 =2) 4000 + 7 + 500 + 30 =3) 6.3 + 0.4 + 1.7 =4) 33 =5) $20.00 - $11.95 =6) ? + 55 = 2007) 3 x 700 =8) 1000 50 =9) 100 x 0.65 =10) 636 3

Page 114: Mental Math

Mental Math # 51) 285 + 65 = 3502) 4000 + 7 + 500 + 30 = 45373) 6.3 + 0.4 + 1.7 = 8.44) 33 = 275) $20.00 - $11.95 = $8.056) 145 + 55 = 2007) 3 x 700 = 21008) 1000 50 = 209) 100 x 0.65 = 6510) 636 3 = 212

Page 115: Mental Math

Mental Math # 61) 75 + 380 =2) 30 = 3) 4.3 + 3.2 + 1.8 =4) 1000 - 540 =5) $100.00 - $59.00 =6) ? + 85 = 2007) 200 x 40 =8) 1000 20 =9) 100 x 4.5 =10) 842 2

Page 116: Mental Math

Mental Math # 61) 75 + 380 = 4552) 30 = 13) 4.3 + 3.2 + 1.8 = 9.34) 1000 - 540 = 4605) $100.00 - $59.00 = $41.006) 115 + 85 = 2007) 200 x 40 = 80008) 1000 20 = 509) 100 x 4.5 = 45010) 842 2 = 421

Page 117: Mental Math

Mental Math # 71) 125 + 35 + 75 =2) 24 =3) 4.5 + 3.5 + 0.8 =4) 350 =5) $10.00 - $3.80 =6) 65 + ? = 3007) 90 x 30 =8) 15cm equals __dm =9) 1000 x 0.15 =10) 560 5 =

Page 118: Mental Math

Mental Math # 71) 125 + 35 + 75 = 2352) 24 = 163) 4.5 + 3.5 + 0.8 = 8.84) 350 = 15) $10.00 - $3.80 = $6.206) 65 + 235 = 3007) 90 x 30 = 27008) 15cm equals 1.5 dm 9) 1000 x 0.15 = 15010) 560 5 = 112

Page 119: Mental Math

Mental Math # 81) 250 + 125 =2) 8m equals ___dm 3) 2.3 + 5.8 + 1.7 =4) 51 =5) $20.00 - $6.99 =6) 95 + ? = 3007) 500 x 70 =8) 550 5 =9) 10 x 1 .33 =10) 361.1 100 =

Page 120: Mental Math

Mental Math # 81) 250 + 125 = 3752) 8m equals 80 dm =3) 2.3 + 5.8 + 1.7 = 9.84) 51 = 55) $20.00 - $6.99 = $13.016) 95 + 205 = 3007) 500 x 70 = 35 0008) 550 5 = 1109) 10 x 1 .33 = 13.310) 361.1 100 = 3.611

Page 121: Mental Math

Mental Math # 91) 8 410 000 in scientific notation =2) 80 =3) $5.50 + $10 + 2.30 =4) 10.3 + 4.6 + 0.4 =5) $10.00 - $2.10 =6) 350 + 500 + ? = 10007) 600 x 3 =8) 446 4 =9) 2.11 x 1000 =10) 762.2 100 =

Page 122: Mental Math

Mental Math # 91) 8 410 000 in scientific notation =

8.41 x 106

2) 80 = 13) $5.50 + $10 + 2.30 = $17.804) 10.3 + 4.6 + 0.4 = 15.35) $10.00 - $2.10 = $7.906) 350 + 500 + 150 = 10007) 600 x 3 = 18008) 446 4 = 111 R29) 2.11 x 1000 = 211010) 762.2 100 = 7.622

Page 123: Mental Math

Mental Math # 101) 355.5 in scientific notation =2) 90 km equals ____ m 3) 4.1 + 3.6 + 1.9 = 4) 1000 – 230 = 5) $20.00 - $9.90 = 6) 180 + ? = 5007) 500 x 20 = 8) 559 5 = 9) 10 x 27.3 = 10) 590.1 100 =

Page 124: Mental Math

Mental Math # 101) 355.5 in scientific notation = 3.555 x

102

2) 90km equals 90 000m 3) 4.1 + 3.6 + 1.9 = 9.64) 1000 – 230 = 7705) $20.00 - $9.90 = $10.106) 180 + 320 = 500 7) 500 x 20 = 10 0008) 559 5 = 111 R49) 10 x 27.3 = 27310) 590.1 100 = 5.901

Page 125: Mental Math

Mental Math # 11

1) If = 1, then =2) 530 000 in scientific notation =3) 7.95m equals ____cm4) 4.3 + 2.5 + 1.7 =5) 1000 – 440 =6) You give $10.00 for a purchase costing

$6.92. What is your change?7) ? + 275 + 25 = 10008) 672 6 =9) 769.1 10 =10)3.4 x 102 =

Page 126: Mental Math

Mental Math # 11

1) If = 1, then = 12.32) 530 000 in scientific notation = 5.3 x

105

3) 7.95m equals 795cm4) 4.3 + 2.5 + 1.7 = 8.55) 1000 – 440 = 5606) You give $10.00 for a purchase costing

$6.92. What is your change? $3.087) 700 + 275 + 25 = 10008) 672 6 = 1129) 769.1 10 = 76.9110)3.4 x 102 = 340

Page 127: Mental Math

Mental Math # 121) If = 1, then = 2) 385 000 = 3) 5.1 + 5.1 + 7.3 = 4) 9 + 40.3 + 0.5 = 5) $10.00 - $6.75 =6) 35 + 25 + ? = 1007) 3000 x 20 = 8) 350 5 = 9) 4.2 x 1000 = 10) 237 10 =

Page 128: Mental Math

Mental Math # 121) If =1, then = 2.32) 385 000 = 3.85 x 105

3) 5.1 + 5.1 + 7.3 = 17.54) 9 + 40.3 + 0.5 = 49.85) $10.00 - $6.75 = $3.256) 35 + 25 + 40 = 1007) 3000 x 20 = 60 0008) 350 5 = 709) 4.2 x 1000 = 420010) 237 10 = 23.7

Page 129: Mental Math

Mental Math # 131) Two squared added to three squared =2) 2L equals ___ mL =3) 1.5 + 1.5 + 1.5 + 1.6 =4) 3100 + 200 + 540 =5) You give $5 for a purchase costing

$2.55. What is your change?6) ? + 275 = 10007) 200 x 80 =8) 384 2 =9) 2.9 x 100 =10) 37 10 =

Page 130: Mental Math

Mental Math # 131) Two squared added to three squared =

132) 2L equals 2000 mL =3) The difference of 52 and 22 =4) 3100 + 200 + 540 = 38405) You give $5 for a purchase costing

$2.55. What is your change? $2.456) 725 + 275 = 10007) 200 x 80 = 16 0008) 384 2 = 1929) 2.9 x 100 = 29010) 37 10 = 3.7

Page 131: Mental Math

Mental Math # 141) 53 dam = ____ m2) 2 x 103 =3) The difference of 52 and 22 =4) 2 + 5.1 + 1.8 =5) You give $5 for a purchase costing

$3.30. What is your change?6) 300 + 199 + ? = 10007) 40 x 500 =8) 396 3 =9) 5.3 x 100 =10)82 10 =

Page 132: Mental Math

Mental Math # 141) 53 dam = 530 m2) 2 x 103 = 20003) The difference of 52 and 22 = 214) 2 + 5.1 + 1.8 = 8.95) You give $5 for a purchase costing

$3.30. What is your change? $1.706) 300 + 199 + 501 = 10007) 40 x 500 = 20 0008) 396 3 = 1329) 5.3 x 100 = 53010) 82 10 = 8.2

Page 133: Mental Math

Mental Math # 151) 210 + 163 =2) 5000 + 660 + 1000 =3) 5.5 + 5.5 + 5.5 =4) 2.9 + 4.4 + 0.6 =5) You give $10 for a purchase costing

$5.99. What is your change?6) 250 + 400 + ? = 10007) 50 x 60 =8) 784 7 =9) 47.3 x 10 =10)2444 100

Page 134: Mental Math

Mental Math # 151) 210 + 163 = 3732) 5000 + 660 + 1000 = 66603) 5.5 + 5.5 + 5.5 = 16.54) 2.9 + 4.4 + 0.6 = 7.95) You give $10 for a purchase costing

$5.99. What is your change? $4.016) 250 + 400 + 350 = 10007) 50 x 60 = 30008) 784 7 = 1129) 47.3 x 10 = 47310)2444 100 = 24.44

Page 135: Mental Math

Mental Math # 161) 3200 + 543 =2) 30 + 7000 + 420 =3) 10 + 5.8 + 3.2 =4) 8.9 – 4.8 =5) You give $20 for a purchase costing

$1.90 What is your change?6) 750 + 200 + ? = 10007) 90 x 20 =8) 575 5 =9) 0.633 x 100 =10)71.4 10

Page 136: Mental Math

Mental Math # 161) 3200 + 543 = 37432) 30 + 7000 + 420 = 74503) 10 + 5.8 + 3.2 = 194) 8.9 – 4.8 = 4.15) You give $20 for a purchase costing

$1.90 What is your change? $18.106) 750 + 200 + 50 = 10007) 90 x 20 = 18008) 575 5 = 1159) 0.633 x 100 = 63.310)71.4 10 = 7.14

Page 137: Mental Math

Mental Math # 171) 6700 + 208 =2) 3000 + 700 + 220 =3) 10.3 + 5.7 + 4.2 =4) 10.9 – 3.5 =5) You give $20 for a purchase costing

$4.30 What is your change?6) 550 + 150 + ? = 10007) The sum of two cubed and two

squared =8) 726 6 =9) 11.5 x 100 =10)51.37 10 =

Page 138: Mental Math

Mental Math # 171) 6700 + 208 = 69082) 3000 + 700 + 220 = 39203) 10.3 + 5.7 + 4.2 =20.24) 10.9 – 3.5 = 7.45) You give $20 for a purchase costing

$4.30 What is your change? $15.706) 550 + 150 + 300 = 10007) The sum of two cubed and two

squared = 128) 726 6 = 1219) 11.5 x 100 = 115010)51.37 10 = 5.137

Page 139: Mental Math

Mental Math # 181) Which is larger –4 or -7 =2) 3 + -5 =3) 100.5 + 20.1 =4) 8.4 – 3.1 =5) You give $100 for a purchase costing

$65.00 What is your change?6) 70 + 500 + ? = 10007) 3100 x 10 =8) 805 5 =9) 5.3 x 100 =10)1.3 10 =

Page 140: Mental Math

Mental Math # 181) Which is larger –4 or -7 = -42) 3 + -5 = -23) 100.5 + 20.1 = 120.64) 8.4 – 3.1 = 5.35) You give $100 for a purchase costing

$65.00 What is your change? $35.006) 70 + 500 + 430 = 10007) 3100 x 10 = 31 0008) 805 5 = 161 9) 5.3 x 100 = 53010)1.3 10 = 0.13

Page 141: Mental Math

Mental Math # 191) (-5) + (-3) = 2) (+8) + (-2) = 3) (-2) + (-4) = 4) (-5) + (+10) 5) You owe you friend $20. You earn $15

babysitting. What is your net worth? 6) (50) - (-10) = 7) (-5) + (+3) = 8) -2 - -6 = 9) 575 5 = 10) -2 - +10 =

Page 142: Mental Math

Mental Math # 191) (-5) + (-3) = -82) (+8) + (-2) = +63) (-2) + (-4) = -64) (-5) + (+10)= +55) You owe you friend $20. You earn $15

babysitting. What is your net worth? $-5

6) (50) - (-10) = 607) (-5) + (+3) = -28) -2 - -6 = +49) 575 5 = 11510) -2 - +10 = -12

Page 143: Mental Math

Mental Math # 201) (-6) + (-3) = 2) (8) + (-2) =3) (-2) - (-4) = 4) (5) x (-10) =5) You owe you friend $20. You earn $8.

What is your net worth? 6) (50) - (-10) = 7) (-5) + (+3) = 8) -20 x -60 = 9) 555 -5 = 10) 2 groups of -10 =

Page 144: Mental Math

Mental Math # 201) (-6) + (-3) = -92) (8) + (-2) = 63) (-2) - (-4) = +24) (5) x (-10) -505) You owe you friend $20. You earn $8.

What is your net worth? $-126) (50) - (-10) = 607) (-5) + (+3) = -28) -20 x -60 = 12009) 555 -5 = -11110) 2 groups of -10 = -20

Page 145: Mental Math

Mental Math # 211) (-2) + (+7) = 2) (-8) - (-5) = 3) (-5) - (-10) = 4) (-6) x (-5) = 5) You have $50. You earn $20 babysitting. You

purchase two tickets for a concert costing $10 each. What is your net worth?

6) Negative 10 squared =7) (+5) + (-3) = 8) 500 x -7 = 9) -448 -2 = 10) Yesterday we earn $230 selling cotton candy.

Last night we earned $150. Our expenses so far is $20. What is our net profit. =

Page 146: Mental Math

Mental Math # 211) (-2) + (+7) = +52) (-8) - (-5) = -33) (-5) - (-10) = +54) (-6) x (-5) = 305) You have $50. You earn $20 babysitting. You

purchase two tickets for a concert costing $10 each. What is your net worth? $50

6) Negative 10 squared = 1007) (+5) + (-3) = +28) 500 x -7 = -35009) -448 -2 = 22410) Yesterday we earn $230 selling cotton candy.

Last night we earned $150. Our expenses so far is $20. What is our net profit. = $360

Page 147: Mental Math

Mental Math # 221) (-12) - (+3) = 2) (-2) - (-5) = 3) (-5) (-10) = 4) 4 + -5 = 5) You owe $60. You earn $5 an hour babysitting.

You baby-sit for 5 hours. What is your net worth?

6) -23 =

7) (+5) . (-3) =

8) -10 x –10 x –10 x -10 = 9) -4 + ? = -110) -60 = 3

Page 148: Mental Math

Mental Math # 221) (-12) - (+3) = -152) (-2) - (-5) = +33) (-5) (-10) = +504) 4 + -5 = -15) You owe $60. You earn $5 an hour babysitting.

You baby-sit for 5 hours. What is your net worth? $-35

6) -23 = -8

7) (+5) . (-3) = -15

8) -10 x –10 x –10 x -10 = 10 0009) -4 + 3 = -110) -60 = -20 3

Page 149: Mental Math

Mental Math # 231) 3.1 x 102 =2) (-5) + (+1) =3) 10.5 + 20.5 + 0.6 =4) (+5) + (-4) =5) You give $100 for a purchase costing

$90.90 What is your change?6) 7 x 100 + 5 x 10 + 3 x 1 = 7) (-3) + (-2) =8) 729 3 =9) 52 =10)(-3) – (-5) =

Page 150: Mental Math

Mental Math # 231) 3.1 x 102 = 3102) (-5) + (+1) = -43) 10.5 + 20.5 + 0.6 = 31.64) (+5) + (-4) = +15) You give $100 for a purchase costing

$90.90 What is your change? $9.106) 7 x 100 + 5 x 10 + 3 x 1 = 7537) (-3) + (-2) = -58) 729 3 = 2439) 52 = 2510)(-3) – (-5) = +2

Page 151: Mental Math

Mental Math # 241) 2.3 x 102 =2) 3 + -2 =3) 50 =4) 9 + 40.3 + 0.5 =5) $10.00 - $6.75 =6) 345 000 in scientific notation =7) (-4) + (+4) =8) 255 5 =9) 4.2 x 1000 =10) 23 =

Page 152: Mental Math

Mental Math # 241) 2.3 x 102 = 2302) 3 + -2 = 13) 50 = 14) 9 + 40.3 + 0.5 = 49.85) $10.00 - $6.75 = $3.256) 345 000 in scientific notation = 3.45 x

105

7) (-4) + (+4) = 08) 255 5 = 519) 4.2 x 1000 = 420010) 23 = 8

Page 153: Mental Math

Mental Math # 251) Double 3000 = 2) 3 x 1000 + 5 x 100 = 3) 7.1 + 8.8 + 1.2 = 4) You spend $5.48. You have $10.00.

What is your change? 5) $100.00 + $432.90 = 6) 670 + ? = 1000 7) 542 x 100 = 8) Three cubed = 9) 844 4 = 10) 81 groups of 102 =

Page 154: Mental Math

Mental Math # 251) Double 3000 = 60002) 3 x 1000 + 5 x 100 = 35003) 7.1 + 8.8 + 1.2 = 17.14) You spend $5.48. You have $10.00.

What is your change? $4.525) $100.00 + $432.90 = $532.906) 670 + 330 = 1000 7) 542 x 100 = 542008) Three cubed = 279) 844 4 = 21110) 81 groups of 102 = 8100

Page 155: Mental Math

Mental Math # 261) Double 2000 and add 300 = 2) 6 x 102 + 3 x 100 = 3) 8.1 + 2.9 + 4.2 = 4) You spend $5.70 You have $10.00.

What is your change? 5) Half of 400 minus 10 = 6) Multiple 9 groups of 50 =7) 62 x 100 = 8) Four squared = 9) 784 100 = 10) 3.2 x 103 =

Page 156: Mental Math

Mental Math # 261) Double 2000 and add 300 = 43002) 6 x 102 + 3 x 100 = 6033) 8.1 + 2.9 + 4.2 = 15.24) You spend $5.70 You have $10.00.

What is your change? $4.305) Half of 400 minus 10 = 1906) Multiple 9 groups of 50 = 4507) 62 x 100 = 62008) Four squared = 169) 784 100 = 7.8410) 3.2 x 103 = 3200

Page 157: Mental Math

Mental Math # 271) The complement to a 600 angle = 2) The complement to a 250 angle = 3) The supplement to a 1000 angle = 4) The supplement to a 1600 angle = 5) The supplement to a 500 angle = 6) The complement to a 720 angle = 7) The complement to a 550 angle = 8) The supplement to a 700 angle = 9) The supplement to a 400 angle = 10)The reflex angle to a 700 angle =

Page 158: Mental Math

Mental Math # 271) The complement to a 600 angle = 300

2) The complement to a 250 angle = 650

3) The supplement to a 1000 angle = 800

4) The supplement to a 1600 angle = 200

5) The supplement to a 500 angle = 1300

6) The complement to a 720 angle = 180

7) The complement to a 550 angle = 350

8) The supplement to a 700 angle = 1100

9) The supplement to a 400 angle = 1400

10)The reflex angle to a 700 angle = 2900

Page 159: Mental Math

Mental Math # 281) The complement to a 750 angle = 2) The complement to a 290 angle = 3) The supplement to a 1520 angle = 4) The supplement to a 1250 angle = 5) The opposite angle to a 500 angle = 6) The reflex angle to a 500 angle = 7) The reflex angle to a 1200 angle = 8) The measure of angle a =9) The measure of angle b =10)The measure of angle c =

a

b c

Page 160: Mental Math

Mental Math # 281) The complement to a 750 angle = 150

2) The complement to a 290 angle = 610

3) The supplement to a 1520 angle = 280

4) The supplement to a 1250 angle = 550

5) The opposite angle to a 500 angle = 500

6) The reflex angle to a 500 angle = 3100

7) The reflex angle to a 1200 angle = 2400

8) The measure of angle a = 450

9) The measure of angle b = 900

10)The measure of angle c = 450

a

b c

Page 161: Mental Math

Mental Math # 291) The m < a =2) The m < b =3) The m < c =4) The m < d =5) The m < e =6) The m < f =7) The m < g =8) The m < h =9) The m < i =10)The m < j =

d

a30o

c b

e f

70o

g

hi

j

Page 162: Mental Math

Mental Math # 291) The m < a = 1500

2) The m < b = 300

3) The m < c = 1500

4) The m < d = 300

5) The m < e = 1500

6) The m < f = 300

7) The m < g = 700

8) The m < h = 700

9) The m < i = 800

10)The m < j = 1100d

a30o

c b

e f

70o

g

hi

j

Page 163: Mental Math

Mental Math # 301) The m < a =2) The m < b = 3) The m < c = 4) The m < d = 5) The m < e = 6) The m < f = 7) The m < g =8) The m < h = 9) The m < i = 10)The m < j =

d

a120o

cb

ef80o

g

hi

j

Page 164: Mental Math

Mental Math # 301) The m < a = 600

2) The m < b = 1200

3) The m < c = 600

4) The m < d = 1000

5) The m < e = 1000

6) The m < f = 800

7) The m < g = 800

8) The m < h = 400

9) The m < i = 400

10)The m < j = 1400

d

a120o

cb

ef80o

g

hi

j

Page 165: Mental Math

Mental Math # 311) 3000 + 705 + 20 = 2) 9000 + 20 + 70 = 3) 4.1 + 3.6 + 1.9 = 4) 1000 – 230 = 5) $100.00 - $9.90 = 6) 180 + ? = 500 7) 500 x 20 = 8) 5 x 101 = 9) 10 x 27.3 = 10) 590.1 102 =

Page 166: Mental Math

Mental Math # 311) 3000 + 705 + 20 = 37252) 9000 + 20 + 70 = 90903) 4.1 + 3.6 + 1.9 = 9.64) 1000 – 230 = 7705) $100.00 - $9.90 = $90.106) 180 + 320 = 500 7) 500 x 20 = 10 0008) 5 x 101 = 509) 10 x 27.3 = 27310) 590.1 102 = 5.901

Page 167: Mental Math

Mental Math # 321) Double 650 = 2) 6 x 1000 + 3 x 100 + 2 x 1= 3) 5.3 + 2.9 + 5.7 = 4) You spend $3.25 You have $10.00.

What is your change? 5) Half of 450 = 6) Multiple 40 groups of 60 =7) 6.5 x 100 = 8) Two squared added to three squared = 9) 6366 3 = 10) 3 groups of 103 =

Page 168: Mental Math

Mental Math # 321) Double 650 = 13002) 6 x 1000 + 3 x 100 + 2 x 1 = 63023) 5.3 + 2.9 + 5.7 = 13.94) You spend $3.25 You have $10.00.

What is your change? $6.755) Half of 450 = 2256) Multiple 40 groups of 60 = 24007) 6.5 x 100 = 6508) Two squared added to three squared =

139) 6366 3 = 212210) 3 groups of 103 = 3000

Page 169: Mental Math

Mental Math # 331) Double the sum of 100 and 150 = 2) 7 x 103 + 8 x 101 = 3) 10.8 - 3.4 = 4) You spend $69.90 You have $100.00.

What is your change? 5) 50 + 20 000 + 300 = 6) Multiple 100 groups of 3.5 =7) The quotient of 35 and 5 = 8) Two cubed = 9) 900 102 = 10) 8 x 103 =

Page 170: Mental Math

Mental Math # 331) Double the sum of 100 and 150 = 5002) 7 x 103 + 8 x 101 = 70803) 10.8 - 3.4 = 7.44) You spend $69.90 You have $100.00.

What is your change? $30.105) 50 + 20 000 + 300 = 20 3506) Multiple 100 groups of 3.5 = 3507) The quotient of 35 and 5 = 78) Two cubed = 89) 900 102 = 910) 8 x 103 = 8000

Page 171: Mental Math

Mental Math # 341) The difference of 70 and 50 times 2 = 2) 6 x 103 + 2 x 100

3) 21.9 + 7.5 = 4) You spend $25.25 You have $100.00.

What is your change? 5) 6000 + 70 000 + 49 = 6) Multiple 100 groups of 47 =7) The quotient of 50 and 10 = 8) Nine squared = 9) 760 102 = 10) 5 x 103 =

Page 172: Mental Math

Mental Math # 341) The difference of 70 and 50 times 2 =

402) 6 x 103 + 2 x 100 = 60023) 21.9 + 7.5 = 29.44) You spend $25.25 You have $100.00 What is your change? $74.755) 6000 + 70 000 + 49 = 76 0496) Multiple 100 groups of 47 = 47007) The quotient of 50 and 10 = 58) Nine squared = 819) 760 102 = 7.610) 5 x 103 = 5000

Page 173: Mental Math

Mental Math # 351) The product of 60 and 5 added to 49 = 2) 50 x 102 = 3) 250 + 350 + 391 = 4) You spend $79.45 You have $100.00.

What is your change? 5) 200 + 900 000 + 4000 + 63 = 6) Multiple 1000 groups of 2.3 = 7) The quotient of 555 and 5 = 8) Six squared, minus ten = 9) 570 100 = 10) 5 x 103 + 9 x 101 =

Page 174: Mental Math

Mental Math # 351) The product of 60 and 5 added to 49 =

3492) 50 x 102 = 50003) 250 + 350 + 391 = 9914) You spend $79.45 You have $100.00.

What is your change? $20.555) 200 + 900 000 + 4000 + 63 = 904 2636) Multiple 1000 groups of 2.3 = 23007) The quotient of 555 and 5 = 1118) Six squared, minus ten = 269) 570 100 = 57010) 5 x 103 + 9 x 101 = 5090

Page 175: Mental Math

Mental Math # 361) The difference of 400 and 200 multiplied

by 4 = 2) 7 x 103 = 3) 400 + 300 + 342 = 4) You spend $29.52 You have $100.00.

What is your change? 5) 600 + 7000 + 40 000 + 79 = 6) Multiple 100 groups of 4.53 = 7) The quotient of 372 and 3 = 8) four squared, added to twenty = 9) 451 100 = 10) 2 x 102 + 9 x 101 =

Page 176: Mental Math

Mental Math # 361) The difference of 400 and 200 multiplied

by 4 = 8002) 7 x 103 = 70003) 400 + 300 + 342 = 10424) You spend $29.52 You have $100.00.

What is your change? $70.485) 600 + 7000 + 40 000 + 79 = 47 6796) Multiple 100 groups of 4.53 = 4537) The quotient of 372 and 3 = 1248) four squared, added to twenty = 369) 451 100 = 45110) 2 x 102 + 9 x 101 = 290

Page 177: Mental Math

Mental Math # 371) Double 320 = 2) 6 x 1000 + 3 x 100 + 2 x 1= 3) 2.1 + 2.9 + 5.7 = 4) You spend $3.89 You have $10.00.

What is your change? 5) Half of 660 = 6) Multiple 300 groups of 6 =7) 6.5 x 100 = 8) Two squared added to ten squared = 9) 6339 3 = 10) 6 groups of 103 =

Page 178: Mental Math

Mental Math # 371) Double 320 = 6402) 6 x 1000 + 3 x 100 + 2 x 1= 63023) 2.1 + 2.9 + 5.7 = 10.74) You spend $3.89 You have $10.00.

What is your change? $6.115) Half of 660 = 3306) Multiple 300 groups of 6 = 18007) 6.5 x 100 = 6508) Two squared added to ten squared =

1049) 6339 3 = 211310) 6 groups of 103 = 6000

Page 179: Mental Math

Mental Math # 381) Double 700 = 2) 63 000 in scientific notation = 3) 100.5 + 100.5 + 100.5 = 4) You spend $5.65 You have $10.00.

What is your change? 5) Half of 2010 = 6) Multiple 5 groups of 700 = 7) 0.56 x 100 = 8) The difference of ten squared and five

squared = 9) 575 5 = 10) 2 groups of 103 =

Page 180: Mental Math

Mental Math # 381) Double 700 = 14002) 63 000 in scientific notation = 6.3 x 104

3) 100.5 + 100.5 + 100.5 = 301.54) You spend $5.65 You have $10.00.

What is your change? 4.355) Half of 2010 = 10056) Multiple 5 groups of 700 = 35007) 0.56 x 100 = 568) The difference of ten squared and five

squared = 759) 575 5 = 11510) 2 groups of 103 = 2000

Page 181: Mental Math

Mental Math # 391) Double 2000 added to 342 = 2) 780 000 in scientific notation = 3) 100.3 x 2 = 4) You spend $50.90 You have $100.00.

What is your change? 5) Half of 612 = 6) Multiple 200 groups of 70 = 7) 6.27 x 100 = 8) The sum of ten squared and five

squared = 9) 715 5 = 10) 8 groups of 102 =

Page 182: Mental Math

Mental Math # 391) Double 2000 added to 342 = 43422) 780 000 in scientific notation = 7.8 x

105

3) 100.3 x 2 = 200.64) You spend $50.90 You have $100.00.

What is your change? $49.105) Half of 612 = 3066) Multiple 200 groups of 70 = 14 0007) 6.27 x 100 = 6278) The sum of ten squared and five

squared = 1259) 715 5 = 14310) 8 groups of 102 = 800

Page 183: Mental Math

Mental Math # 401) The difference between three groups of

five hundred and two hundred = 2) 4555.5 in scientific notation = 3) 200.2 x 3 = 4) You spend $65.00 You have four $20.00

bills. What is your change? $5) Half of 866 =6) Multiple 20 groups of 150 = 7) 6.27 x 100 = 8) The sum of two squared and three

squared = 9) 655 5 = 10) 8.1 x 102 =

Page 184: Mental Math

Mental Math # 401) The difference between three groups of five

hundred and two hundred = 13002) 4555.5 in scientific notation = 4.5555 x 103

3) 200.2 x 3 = 600.64) You spend $65.00 You have four $20.00

bills. What is your change? $15.005) Half of 866 = 4336) Multiple 20 groups of 150 = 30007) 6.27 x 100 = 6278) Sum of two squared and three squared = 139) 655 5 = 13110) 8.1 x 102 = 810

Page 185: Mental Math
Page 186: Mental Math

Mental Math # 11) The difference between five groups of

one hundred and fifty = 2) 735 000 in scientific notation = 3) 400.5 x 2 = 4) You spend $71.00 You have two $50 bills.

What is your change? 5) Half of 1040 = 6) Multiple 30 groups of 70 = 7) 97 x 1000 = 8) Sum of ten cubed and five squared = 9) 723 3 = 10) 52 x 103 =

Page 187: Mental Math

Mental Math # 11) The difference between five groups of one

hundred and fifty = 4502) 735 000 in scientific notation = 7.35 x 105

3) 400.5 x 2 = 8014) You spend $71.00 You have two $50 bills.

What is your change? $29.005) Half of 1040 = 5206) Multiple 30 groups of 70 = 21007) 97 x 1000 = 97 0008) Sum of ten cubed and five squared =

10259) 723 3 = 24110) 52 x 103 = 52 000

Page 188: Mental Math

Mental Math # 21) Three groups of one hundred increased

by two hundred forty two = 2) 640.01 in scientific notation = 3) 200.15 + 500.03 = 4) You spend $36.05 You have two $20 bills.

What is your change? 5) Half of 584 =6) Multiple 35 groups of 200 = 7) 3.4 x 100 = 8) Sum of ten squared and four squared = 9) -7 - +2 = 10) 79 x 102 =

Page 189: Mental Math

Mental Math # 21) Three groups of one hundred increased by

two hundred forty two = 5422) 640.01 in scientific notation = 6.4001 x 102

3) 200.15 + 500.03 = 700.184) You spend $36.05 You have two $20 bills.

What is your change? $3.955) Half of 584 = 2926) Multiple 35 groups of 200 = 70007) 3.4 x 100 = 3408) Sum of ten squared and four squared = 1169) -7 - +2 = -910) 79 x 102 = 7900

Page 190: Mental Math

Mental Math # 31) Three groups of two hundred decreased

by one hundred = 2) 47 000 in scientific notation = 3) 40.1 + 30.22 = 4) You spend $24.50 You have a $50 bill.

What is your change? 5) Half of 876 = 6) Multiple 3 groups of 500 = 7) 45 x 1000 = 8) Sum of three squared and five squared = 9) +5 + -7 = 10) 9 x 103 =

Page 191: Mental Math

Mental Math # 31) Three groups of two hundred decreased by

one hundred = 5002) 47 000 in scientific notation = 4.7 x 104

3) 40.1 + 30.22 = 70.324) You spend $24.50 You have a $50 bill.

What is your change? $25.505) Half of 876 = 4386) Multiple 3 groups of 500 = 15007) 45 x 1000 = 45 0008) Sum of three squared and five squared =

349) +5 + -7 = -210) 9 x 103 = 9000

Page 192: Mental Math

Mental Math # 41) Four groups of twenty decreased by one

group of ten = 2) 27O 000 in scientific notation = 3) 4.1 + 3.9 + 6.5 = 4) You spend $45.00 You have three $20

bills. What is your change?5) Half of 706 = 6) Multiple 3 groups of 800 = 7) 5 x 1000 + 3 x 100 = 8) Sum of three squared and ten squared = 9) (-5) – (-7) = 10) 5 x 103 =

Page 193: Mental Math

Mental Math # 41) Four groups of twenty decreased by one

group of ten = 702) 27O 000 in scientific notation = 2.7 x 105

3) 4.1 + 3.9 + 6.5 = 14.54) You spend $45.00 You have three $20

bills. What is your change? $15.005) Half of 706 = 3536) Multiple 3 groups of 800 = 24007) 5 x 1000 + 3 x 100 = 53008) Sum of three squared and ten squared =

1099) (-5) – (-7) = +210) 5 x 103 = 5000

Page 194: Mental Math

Mental Math # 51) Four groups of fifty decreased by one

group of twenty = 2) 94 000 in scientific notation = 3) 5.4 + 2.9 + 5.6 = 4) You spend $69.00 You have four $20 bills.

What is your change?5) Half of 524 = 6) 5 groups of 500 = 7) 3 x 1000 + 7 x 100 + 5 x 1 = 8) Sum of five squared and ten squared = 9) 590 + ? = 100010) 6 x 103 =

Page 195: Mental Math

Mental Math # 51) Four groups of fifty decreased by one

group of twenty = 1802) 94 000 in scientific notation = 9.4 x 104

3) 5.4 + 2.9 + 5.6 = 13.94) You spend $69.00 You have four $20 bills.

What is your change? $11.005) Half of 524 = 2626) 5 groups of 500 = 25007) 3 x 1000 + 7 x 100 + 5 x 1 = 37058) Sum of five squared and ten squared =

1259) 590 + 410 = 100010) 6 x 103 = 6000

Page 196: Mental Math

Mental Math # 61) Eight groups of one hundred decreased

by three hundred fifty = 2) 89 100 000 in scientific notation = 3) 8.3 + 2.7 + 5.5 = 4) You spend $57.35 You have six $10 bills.

What is your change?5) Half of 966 = 6) 40 groups of 50 = 7) 3 x 100 + 9 x 1000 + 5 x 10 = 8) Sum of two cubed and four squared =9) 270 + ? = 100010) 4 x 101 =

Page 197: Mental Math

Mental Math # 61) Eight groups of one hundred decreased by

three hundred fifty = 4502) 89 100 000 in scientific notation = 8.91 x

107

3) 8.3 + 2.7 + 5.5 = 16.54) You spend $57.35 You have six $10 bills.

What is your change? $2.655) Half of 966 = 4836) 40 groups of 50 = 20007) 3 x 100 + 9 x 1000 + 5 x 10 = 93508) Sum of two cubed and four squared = 249) 270 + 730 = 100010) 4 x 101 = 40

Page 198: Mental Math

Mental Math # 71) Three groups of two hundred increased by three

groups of fifty = 2) 5 550 000 in scientific notation = 3) 1.5 + 1.5 + 1.5 + 6.5 = 4) You spend $32.50 You have two $20 bills. What

is your change? 5) 972 3 = 6) 30 groups of 500 = 7) (+3) + (-5) = 8) Sum of three cubed and ten squared = 9) I owe seven dollars to my friend. I get my

allowance of ten dollars. What is my net worth? =

10) 78 x 100 =

Page 199: Mental Math

Mental Math # 71) Three groups of two hundred increased by three

groups of fifty = 7502) 5 550 000 in scientific notation = 5.55 x 106

3) 1.5 + 1.5 + 1.5 + 6.5 = 114) You spend $32.50 You have two $20 bills. What is

your change? $7.505) 972 3 = 3246) 30 groups of 500 = 15 0007) (+3) + (-5) = -28) Sum of three cubed and ten squared = 1279) I owe seven dollars to my friend. I get my

allowance of ten dollars. What is my net worth? = +3

10) 78 x 100 = 78

Page 200: Mental Math

Mental Math # 81) Double 150 added to 198 =2) 341.5 in scientific notation = 3) 123 x 3 = 4) You spend $40.20 You have five

$10.00. What is your change? 5) Half of 276 = 6) Multiple 90 groups of 90 = 7) (-5) - (-8) = 8) Two to the exponent four =9) 6/30 in lowest terms is = 10) 7 groups of 100 =

Page 201: Mental Math

Mental Math # 81) Double 150 added to 198 = 4982) 341.5 in scientific notation = 3.415 x

102

3) 123 x 3 = 3694) You spend $40.20 You have five $10.00.

What is your change? $9.805) Half of 276 = 1386) Multiple 90 groups of 90 = 81007) (-5) - (-8) = +38) Two to the exponent four = 169) 6/30 in lowest terms is = 1/510) 7 groups of 100 = 7

Page 202: Mental Math

Mental Math # 91) Double 551 = 2) 40 500 in scientific notation = 3) 312 x 3 = 4) You spend $73.90 You have four

$20.00. What is your change? 5) Half of 724 = 6) Multiple 40 groups of 600 = 7) (5) - (-4) = 8) Two to the exponent five plus five = 9) 4/12 in lowest terms is = 10) 12/5 as a mixed number =

Page 203: Mental Math

Mental Math # 91) Double 551 = 11022) 40 500 in scientific notation = 4.05 x

104

3) 312 x 3 = 9364) You spend $73.90 You have four

$20.00. What is your change? $6.105) Half of 724 = 3626) Multiple 40 groups of 600 = 24 0007) (5) - (-4) = +98) Two to the exponent five plus five = 379) 4/12 in lowest terms is = 1/310) 12/5 as a mixed number = 2 2/5

Page 204: Mental Math

Mental Math # 101) Double 623 = 2) 800 000 in scientific notation = 3) 211 x 5 = 4) You spend $53.50 You have three

$20.00. What is your change? 5) Half of 872 =6) Multiple 60 groups of 600 = 7) (1) + (-4) = 8) Five to the exponent two plus ten = 9) 3/15 in lowest terms is = 10) 14/3 as a mixed number =

Page 205: Mental Math

Mental Math # 101) Double 623 = 12462) 800 000 in scientific notation = 8 x 105

3) 211 x 5 = 10554) You spend $53.50 You have three

$20.00. What is your change? $6.505) Half of 872 = 4366) Multiple 60 groups of 600 = 36 0007) (1) + (-4) = -38) Five to the exponent two plus ten = 359) 3/15 in lowest terms is = 1/510) 14/3 as a mixed number = 4 2/3

Page 206: Mental Math

Mental Math # 111) Which is larger 2/11 or 2/9 = 2) Which is larger 5/11 or 4/7 = 3) Which is larger 0.8 or 0.553 = 4) 12/18 in lowest terms =5) 18/4 as a mixed number = 6) 3/10 as a percent = 7) 2/25 as a percent =8) 0.05 as a percent = 9) 131/100 as a decimal = 10) 9/10 of a bars added to 5/8 of a bar is

closer to 1, 1 1/2 or 2 whole bars =

Page 207: Mental Math

Mental Math # 111) Which is larger 2/11 or 2/9 = 2/92) Which is larger 5/11 or 4/7 = 4/73) Which is larger 0.8 or 0.553 = 0.84) 12/18 in lowest terms 2/35) 18/4 as a mixed number = 4 1/26) 3/10 as a percent = 30 %7) 2/25 as a percent = 8%8) 0.05 as a percent = 5 %9) 131/100 as a decimal = 1.3110) 9/10 of a bars added to 5/8 of a bar is

closer to 1, 1 1/2 or 2 whole bars = 1 1/2

Page 208: Mental Math

Mental Math # 121) Which is larger 5/9 or 3/8 = 2) Which is larger 6/10 or 11/20 = 3) Which is larger 0.2 or 0.199 = 4) 6/15 in lowest terms 5) 15/3 as a mixed number = 6) 9/10 as a percent = 7) 11/20 as a percent = 8) 0.18 as a percent = 9) 235/100 as a decimal = 10) 5/12 of a bars added to 11/20 of a bar

is closer to 1, 1 1/2 or 2 whole bars =

Page 209: Mental Math

Mental Math # 121) Which is larger 5/9 or 3/8 = 5/92) Which is larger 6/10 or 11/20 = 6/103) Which is larger 0.2 or 0.199 = 0.24) 6/15 in lowest terms 2/55) 15/3 as a mixed number = 56) 9/10 as a percent = 90 %7) 11/20 as a percent = 55%8) 0.18 as a percent = 18%9) 235/100 as a decimal = 2.3510) 5/12 of a bars added to 11/20 of a bar

is closer to 1, 1 1/2 or 2 whole bars = 1

Page 210: Mental Math

Mental Math # 131) Which is larger 11/20 or 7/18 = 2) Which is larger 20/40 or 5/8 = 3) Which is larger 0.321 or 0.319 = 4) 16/20 in lowest terms =5) 7/2 as a mixed number = 6) 1/5 of 20 = 7) 5/25 as a percent = 8) 0.07 as a percent = 9) 34/100 as a decimal = 10) 11/12 + 11/20 of a bar is closer to 1, 1 1/2 or 2 whole bars =

Page 211: Mental Math

Mental Math # 131) Which is larger 11/20 or 7/18 = 11/202) Which is larger 20/40 or 5/8 = 5/83) Which is larger 0.321 or 0.319 = 0.3214) 16/20 in lowest terms = 4/55) 7/2 as a mixed number = 3 1/26) 1/5 of 20 = 47) 5/25 as a percent = 20%8) 0.07 as a percent = 7%9) 34/100 as a decimal = 0.3410) 11/12 + 11/20 of a bar is closer to 1, 1 1/2 or 2 whole bars = 1 1/2

Page 212: Mental Math

Mental Math # 141) The diagram best represents

what percent shaded? 30%, 50% or 70%

2) The diagram best represents what percent shaded? 30%, 50% or 70%

Page 213: Mental Math

3) The diagram best represents what percent shaded? 30%, 50% or 70%

4) The diagram best represents what percent shaded? 25%, 50% or 75%

Page 214: Mental Math

5) The diagram best represents what percent shaded? 38%, 50% or 66%

6) The diagram best represents what percent shaded? 33%, 53% or 73%

Page 215: Mental Math

7) The diagram best represents what percent shaded? 30%, 50% or 70%

8) The diagram best represents what percent shaded? 20%, 40% or 60%

Page 216: Mental Math

9) The diagram best represents what percent shaded? 25%, 50% or 75%

10) The diagram best represents what percent shaded? 25%, 50% or 75%

Page 217: Mental Math

Mental Math # 141) The diagram best represents

what percent shaded? 30%, 50% or 70%

2) The diagram best represents what percent shaded? 30%, 50% or 70%

Page 218: Mental Math

3) The diagram best represents what percent shaded? 30%, 50% or 70%

4) The diagram best represents what percent shaded? 25%, 50% or 75%

Page 219: Mental Math

5) The diagram best represents what percent shaded? 38%, 50% or 66%

6) The diagram best represents what percent shaded? 33%, 53% or 73%

Page 220: Mental Math

7) The diagram best represents what percent shaded? 30%, 50% or 70%

8) The diagram best represents what percent shaded? 20%, 40% or 60%

Page 221: Mental Math

9) The diagram best represents what percent shaded? 25%, 50% or 75%

10) The diagram best represents what percent shaded? 25%, 50% or 75%

Page 222: Mental Math

Mental Math # 151) Double the sum of 100 and 150 =2) 7 x 103 + 8 x 101 = 3) -10 - -2 = 4) You spend $69.90 You have $100.00.

What is your change?5) 50 + 20 000 + 300 = 6) Multiple 100 groups of 3.5 = 7) The quotient of 35 and 5 = 8) Two cubed = 9) 900 102 = 10) 8 x 103 =

Page 223: Mental Math

Mental Math # 151) Double the sum of 100 and 150 = 5002) 7 x 103 + 8 x 101 = 70803) -10 - -2 = -84) You spend $69.90 You have $100.00.

What is your change? $30.105) 50 + 20 000 + 300 = 20 3506) Multiple 100 groups of 3.5 = 3507) The quotient of 35 and 5 = 78) Two cubed = 89) 900 102 = 910) 8 x 103 = 8000

Page 224: Mental Math

Mental Math # 161) The difference of 70 and 50 times 2 = 2) 6 x 103 + 2 x 100 = 3) 21.9 + 7.5 = 4) You spend $25.25 You have $100.00 What is your change? 5) 6000 + 70 000 + 49 = 6) Multiple 100 groups of 47 = 7) The quotient of 50 and 10 = 8) Nine squared = 9) 760 102 = 10) 5 x 103 =

Page 225: Mental Math

Mental Math # 161) The difference of 70 and 50 times 2 =

402) 6 x 103 + 2 x 100 = 60023) 21.9 + 7.5 = 29.44) You spend $25.25 You have $100.00 What is your change? $74.755) 6000 + 70 000 + 49 = 76 0496) Multiple 100 groups of 47 = 47007) The quotient of 50 and 10 = 58) Nine squared = 819) 760 102 = 7.610) 5 x 103 = 5000

Page 226: Mental Math

Mental Math # 171) Double 2000 added to 342 = 2) 780 000 in scientific notation = 3) 100.3 x 2 = 4) You spend $50.90 You have $100.00.

What is your change? 5) Half of 612 = 6) Multiple 200 groups of 70 = 7) $6.27 x 100 = 8) The sum of ten squared and five squared

=9) 715 5 = 10) 8 groups of 102 =

Page 227: Mental Math

Mental Math # 171) Double 2000 added to 342 = 43422) 780 000 in scientific notation = 7.8 x 105 3) 100.3 x 2 = 200.64) You spend $50.90 You have $100.00.

What is your change? $49.105) Half of 612 = 3066) Multiple 200 groups of 70 = 14 0007) $6.27 x 100 = $6278) The sum of ten squared and five

squared = 1259) 715 5 = 14310) 8 groups of 102 = 800

Page 228: Mental Math

Mental Math # 181) 2 x 8 x 5 = 2) 25 x 22 x 4 = 3) 2 x 9 x 50 = 4) 4 x 6 x 5 = 5) 10 x 4 x 9 x 10 = 6) 2 x 50 x 2 x 7 = 7) 2 x 9 x 5 x 2 =8) 2 x 4 x 5 x 11 = 9) 7 x 3 x 5 x 20 = 10) 2 x 25 x 50 =

Page 229: Mental Math

Mental Math # 181) 2 x 8 x 5 = 802) 25 x 22 x 4 = 2200 3) 2 x 9 x 50 = 9004) 4 x 6 x 5 = 1205) 10 x 4 x 9 x 10 = 36006) 2 x 50 x 2 x 7 = 14007) 2 x 9 x 5 x 2 = 1808) 2 x 4 x 5 x 11 = 4409) 7 x 3 x 5 x 20 = 210010) 2 x 25 x 50 = 2500

Page 230: Mental Math

Mental Math # 191) 4 x 52 x 25 = 2) 3 x 4 x 5 x 6 =3) 2 x 3 x 50 = 4) 2 x 6 x 500 = 5) 10 x 40 x 2 = 6) 20 x 5 x 7 x 2 = 7) 2 x 9 x 5 x 2 = 8) 2 x 4 x 25 x 11 = 9) 2 x 2 x 5 x 20 = 10) 2 x 9 x 4 x 5 x 0 =

Page 231: Mental Math

Mental Math # 191) 4 x 52 x 25 = 52002) 3 x 4 x 5 x 6 = 360 3) 2 x 3 x 50 = 3004) 2 x 6 x 500 = 60005) 10 x 40 x 2 = 8006) 20 x 5 x 7 x 2 = 14007) 2 x 9 x 5 x 2 = 1808) 2 x 4 x 25 x 11 = 22009) 2 x 2 x 5 x 20 = 40010) 2 x 9 x 4 x 5 x 0 = 0

Page 232: Mental Math

Mental Math # 201) 6 x 15 x 2 = 2) 3 x 5 x 5 x 2 = 3) 4 x 5 x 25 x 4 = 4) 50 x 6 x 2 x 6 = 5) 50 x 4 x 12 = 6) 2 x 5 x 7 x 2 = 7) 20 x 13 x 5 = 8) 4 x 25 x 56 = 9) 9 x 2 x 50 x 9 = 10) 2 x 6 x 4 x 5 =

Page 233: Mental Math

Mental Math # 201) 6 x 15 x 2 = 1802) 3 x 5 x 5 x 2 = 150 3) 4 x 5 x 25 x 4 = 20004) 50 x 6 x 2 x 6 = 36005) 50 x 4 x 12 = 24006) 2 x 5 x 7 x 2 = 1407) 20 x 13 x 5 = 13008) 4 x 25 x 56 = 56009) 9 x 2 x 50 x 9 = 810010) 2 x 6 x 4 x 5 = 240