Why Mental Math?• Calculating in you head is a practical life skill.• Mental math can make written computation

easier or quicker• Proficiency in mental math contributes to

increased skill in estimation• Mental calculation can lead to a better

understanding of place value, mathematical operations, and basic number sense.

• It is new a challenge each day• Bi-weekly draws• OUR BRAIN IS WITH US WHEREVER WE GO,

OUR CALCULATOR IS NOT!!

Guidelines for Mental Math• Mental math is DAILY, but not necessarily a

test daily• Each test will be 10 questions• 5 seconds to answer each question• Test is self corrected, you recorded results• name goes in for a draw (1, 2, 3 chances)• If corrected incorrectly no chance to win

during the next draw.• If no red pen, no tickets for that day• Unprepared for three classes eliminates

you from that weeks draw.• Strategies used will be discussed

Mental Math # 11) The operation associated with the term addend is ?2) The operation associated with the term quotient is ?3) The operation associated with the term factor is ?4) The operation associated with the term dividend is ?5) The operation associated with the term product is ?6) The operation associated with the term minuend is ?7) The operation associated with the term sum is ?8) The operation associated with the term subtrahend is ?9) The operation associated with the term is divisor?10) The operation associated with the term is difference ?

Mental Math # 11) The operation associated with the term addend is +

2) The operation associated with the term quotient is 3) The operation associated with the term factor is x

4) The operation associated with the term dividend is 5) The operation associated with the term product is x6) The operation associated with the term minuend is -7) The operation associated with the term sum is +8) The operation associated with the term subtrahend is -

9) The operation associated with the term is divisor 10) The operation associated with the term is difference -

Mental Math # 21) 70 + 43 = 1132) 10 + 70 + 3 = 833) 200 - 50 = 1504) 50 – 10 = 405) 500 - 200 = 3006) 4 x 4 = 167) 4 x 300 = 12008) 50 10 = 59) 8 4 = 210)40 1 = 40

Name the term

represented by the number that is blue.

Mental Math # 21) 70 + 43 (addend) = 1132) 10 + 70 + 3 = 83 (sum)3) 200 (minuend) - 50 = 1504) 50 – 10 = 40 (difference)5) 500 - 200 (subtrahend) = 3006) 4 (factor) x 4 = 167) 4 x 300 = 120 (product)8) 50 10 = 5 (quotient)9) 8 4 (divisor) = 210)40 (dividend) 1 = 40

Mental Math # 31) 70 x 40 = 28002) 500 + 43 = 5433) 20 5 = 44) 20 x 50 = 10005) 700 – 300 = 4006) 50 + 50 = 1007) 30 2 = 158) 50 - 10 = 40 9) 8 4 = 2 10)100 - 40 = 60

Name the term

represented by the number that is blue.

Mental Math # 31) 70 x 40 (factor) = 28002) 500 + 43 = 543 (sum)3) 20 (dividend) 5 = 44) 20 (factor) x 50 = 10005) 700 (minuend) – 300 = 4006) 50 (addend) + 50 = 1007) 30 2 (divisor) = 158) 50 - 10 = 40 (difference)9) 8 4 = 2 (quotient) 10)100 - 40 (subtrahend) = 60

Mental Math # 41) When you multiply 2 numbers, the result is called the ?2) The numbers you add together to get a result are called

the ?3) How many you take away from the amount you started

with is called the ?4) The amount you start with when dividing is called the ?5) The result of dividing 2 numbers is called the ?6) To find a product, the numbers you multiply are called ?7) The result of 2 numbers added together is called the ?8) The number of equal groups you want to make when

dividing is called the ?9) The amount you get when subtracting two numbers is

called the ?10) The amount you start with when subtracting is called

the ?

Mental Math # 41) When you multiply 2 numbers, the result is called the

product.2) The numbers you add together to get a result are called

the addends.3) How many you take away from the amount you started

with is called the subtrahend.4) The amount you start with when dividing is called the

dividend.5) The result of dividing 2 numbers is called the quotient.6) To find a product, the numbers you multiply are called

factors.7) The result of 2 numbers added together is called the sum.8) The number of equal groups you want to make when

dividing is called the divisor.9) The amount you get when subtracting two numbers is

called the difference.10) The amount you start with when subtracting is called the

minuend.

Mental Math # 51) The product of 5 and 2 is ?2) The sum of 5 and 2 is ?3) The factors are 3 and 5; the result is ?4) The difference of 10 and 8 is ?5) 4 x 100 + 8 x 1 + 5 x 1000 =6) 50 000 + 3000 + 20 + 7 =7) 500 + 300 + 40 =8) 80 + 40 + 20 + 2 =9) 4000 + 500 + 3000 + 20 =10)The quotient is 5, the divisor is 6

what is the dividend?

Mental Math # 51) The product of 5 and 2 is ? 102) The sum of 5 and 2 is ? 73) The factors are 3 and 5; the result is?

154) The difference of 10 and 8 is ? 25) 4 x 100 + 8 x 1 + 5 x 1000 = 54086) 50 000 + 3000 + 20 + 7 = 53 0277) 500 + 300 + 40 = 8408) 80 + 40 + 20 + 2 = 1429) 4000 + 500 + 3000 + 20 = 752010)The quotient is 5, the divisor is 6 what

is the dividend? 30

Mental Math # 61) 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 =

Mental Math # 61) 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

Mental Math # 71) 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 =

Mental Math # 71) 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

Mental Math # 81) 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 =

Mental Math # 81) 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

Mental Math # 91) 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 =

Mental Math # 91) 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 = 87 6007) 50 + 90 + 50 + 5 + 10 = 2058) 300 + 600 + 700 + 42 = 16429) 4000 + 500 + 500 + 33 = 503310) 3700 + 300 + 76 = 4076

Mental Math # 101) 8 x 8 = 2) 5 x 9= 3) 4 x 6 = 4) 20 divided by 5 = 5) 3 x 7 = 6) 72 divided by 9 = 7) 7 x 8 = 8) 30 divided by 6 = 9) 7 x 7 = 10) 60 divided by 6 =

Mental Math # 101) 8 x 8 = 642) 5 x 9= 453) 4 x 6 = 244) 20 divided by 5 = 45) 3 x 7 = 216) 72 divided by 9 = 87) 7 x 8 = 568) 30 divided by 6 = 59) 7 x 7 = 4910) 60 divided by 6 = 10

Mental Math # 111) 4 x 8 = 2) 3 x 9= 3) 7 x 5 = 4) 36 divided by 6 = 5) 9 x 9 = 6) 56 divided by 7 = 7) 2 x 8 = 8) 55 divided by 5 = 9) 7 x 6 = 10) 64 divided by 8 =

Mental Math # 111) 4 x 8 = 322) 3 x 9= 273) 7 x 5 = 354) 36 divided by 6 = 65) 9 x 9 = 816) 56 divided by 7 = 87) 2 x 8 = 168) 55 divided by 5 = 119) 7 x 6 = 4210) 64 divided by 8 = 8

Mental Math # 121) 4 x 3 = 2) 6 x 8= 3) 8 x 5 = 4) 63 divided by 9 = 5) 4 x 7 = 6) 32 divided by 4 = 7) 2 x 12 = 8) 72 divided by 8 = 9) 7 x 7 = 10) 48 divided by 8 =

Mental Math # 121) 4 x 3 = 122) 6 x 8= 483) 8 x 5 = 404) 63 divided by 9 = 75) 4 x 7 = 286) 32 divided by 4 = 87) 2 x 12 = 248) 72 divided by 8 = 99) 7 x 7 = 4910) 48 divided by 8 = 6

Mental Math # 131) 8 x 3 = 2) 9 x 8= 3) 9 x 6 = 4) 36 divided by 9 = 5) 4 x 4 = 6) 40 divided by 5 = 7) 3 x 12 = 8) 42 divided by 6 = 9) 7 x 4 = 10) 64 divided by 8 =

Mental Math # 131) 8 x 3 = 242) 9 x 8= 723) 9 x 6 = 544) 36 divided by 9 = 45) 4 x 4 = 166) 40 divided by 5 = 87) 3 x 12 = 368) 42 divided by 6 = 79) 7 x 4 = 2810) 64 divided by 8 = 8

Mental Math # 141) 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 =

Mental Math # 141) 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

Mental Math # 151) 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 =

Mental Math # 151) 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

Mental Math # 161) 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 =

Mental Math # 161) 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

Mental Math # 171) 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 =

Mental Math # 171) 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

Mental Math # 181) 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 =

Mental Math # 181) 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

Mental Math # 191) 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 =

Mental Math # 191) 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

Mental Math # 201) 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 =

Mental Math # 201) 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

Mental Math # 211) 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 =

Mental Math # 211) 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

One Whole

Mental Math # 221)

2)

3)

4)

5)

6)

7)

8)

9)

10)

Mental Math # 221)

One and four tenths or

1.4

2)

Fifty-threehundredths or

0.53

3)

One and threehundredths or

1.03

4)

One andTwo tenths or

1.2

5)

One and thirty-four

thousandths or 1. 034

6)

Five thousandths or 0.005

7)

One and thirteen thousandths or

1.013

8)

Two and one hundred forty-

two thousandths or 2.142

9)

Twenty-two thousandths or

0.022

10)

One and five hundredths or

1.05

Mental Math # 231)

2)

3)

4)

5)

One Whole

Mental Math # 236)

7)

8)

9)

10)

One Whole

Mental Math # 231)

2)

3)

4)

5)

1.1341.134

2.0162.016

1.3081.308

2.1532.153

4.2314.231

Mental Math # 236)

7)

8)

9)

10)

1.1091.109

2.2212.221

1.0061.006

0.3420.342

4.034.03

Mental Math # 241)

2)

3)

4)

5)

One Whole

Mental Math # 246)

7)

8)

9)

10)

One Whole

Mental Math # 241)

2)

3)

4)

5)

One Whole

1.131.13

10.3710.37

21.3321.33

5.045.04

33.61

33.61

Mental Math # 246)

7)

8)

9)

10)

One Whole

15.315.3

1.031.03

3.323.32

10.510.5

1.21.2

Mental Math # 251)

2)

3)

4)

5)

One Whole

Mental Math # 256)

7)

8)

9)

10)

One Whole

Mental Math # 251)

2)

3)

4)

5)

One Whole

2.052.05

0.720.72

0.40.4

13.0613.06

30.0430.04

Mental Math # 256)

7)

8)

9)

10)

One Whole

13.01

13.01

1.131.13

2.52.5

0.420.42

1.271.27

Mental Math # 261) 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 =

Mental Math # 261) 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

Mental Math # 271) 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 =

Mental Math # 271) 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

Mental Math # 281) 9.252 rounded to the nearest hundredth = 2) 2399 rounded to the nearest thousand = 3) 5.984 rounded to the nearest tenth = 4) 48.55 rounded to the nearest tenth = 5) 10.087 rounded to the nearest hundredth = 6) 8.8 rounded to the nearest whole number =7) 7535.9 rounded to the nearest hundred = 8) 7.22 rounded to the nearest whole number = 9) 0.9999 rounded to the nearest thousandths = 10) 33.91 rounded to the nearest tenth =

Mental Math # 281) 9.252 rounded to the nearest hundredth = 9.252) 2399 rounded to the nearest thousand = 20003) 5.984 rounded to the nearest tenth = 64) 48.55 rounded to the nearest tenth = 48.65) 10.087 rounded to the nearest hundredth = 10.096) 8.8 rounded to the nearest whole number = 97) 7535.9 rounded to the nearest hundred = 75008) 7.22 rounded to the nearest whole number = 79) 0.9999 rounded to the nearest thousandths = 110) 33.91 rounded to the nearest tenth = 33.9

Mental Math # 291) 50 x 30 =2) 80 x 3 =3) 20 x 20 =4) 40 x 80 =5) 300 x 3 =6) 60 x 500 = 7) 800 x 50 =8) 900 x 20 =9) 60 x 90 =10) 40 x 300 =

Mental Math # 291) 50 x 30 = 15002) 80 x 3 = 2403) 20 x 20 = 4004) 40 x 80 = 32005) 300 x 3 = 9006) 60 x 500 = 30 0007) 800 x 50 = 40 0008) 900 x 20 = 18 0009) 60 x 90 = 540010) 40 x 300 = 12 000

Mental Math # 301) 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 =

Mental Math # 301) 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

Mental Math # 311) 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 =

Mental Math # 311) 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

Mental Math # 32* denotes an estimate

1) 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 = *

Mental Math # 321) 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

Mental Math # 33 * denotes an estimate

1) 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 =

Mental Math # 331) 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

Mental Math # 341) 4 x 45 = 2) 97 x 2 = 3) 6 x 55 = 4) 5 x 36 = 5) 4 x 622 = 6) 34 x 3 = 7) 20 x 18 = 8) 7 x 56 = 9) 66 x 3 = 10) 52 x 7 =

Mental Math # 341) 4 x 45 = 1802) 97 x 2 = 1943) 6 x 55 = 3304) 5 x 36 = 1805) 4 x 622 = 24886) 34 x 3 = 1027) 20 x 18 = 3608) 7 x 56 = 3929) 66 x 3 = 19810) 52 x 7 = 364

Mental Math # 351) 45 x 5 = 2) 76 x 3 = 3) 61 x 5 = 4) 54 x 3 = 5) 4 x 62 = 6) 43 x 4 = 7) 3 x 91 = 8) 4 x 65 = 9) 9 x 32 = 10) 5 x 73 =

Mental Math # 351) 45 x 5 = 2252) 76 x 3 = 2283) 61 x 5 = 3054) 54 x 3 = 1625) 4 x 62 = 2486) 43 x 4 = 1727) 3 x 91 = 2738) 4 x 65 = 2609) 9 x 32 = 28810) 5 x 73 = 365

Mental Math # 361) 55 x 4 = 2) 92 x 5 = 3) 71 x 7 = 4) 4 x 71 = 5) 9 x 63 = 6) 20 x 49 = 7) 30 x 51 = 8) 3 x 77 = 9) 6 x 35 = 10) 63 x 7 =

Mental Math # 361) 55 x 4 = 2202) 92 x 5 = 4603) 71 x 7 = 4974) 4 x 71 = 2845) 9 x 63 = 5676) 20 x 49 = 9807) 30 x 51 = 15308) 3 x 77 = 2319) 6 x 35 = 21010) 63 x 7 = 441

Mental Math # 371) 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 =

Mental Math # 371) 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

Mental Math # 381) 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 =

Mental Math # 381) 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

Mental Math # 391) 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 =

Mental Math # 391) 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

Mental Math # 401) 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 =

Mental Math # 401) 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