Mulitply Whole Numbers
Divide Whole Numbers
Find the Mistake
Estimate
100

45 x 7

what is 315

100

2,248 divided by 4

what is 562

100

72 x 12 = 

70 x 10 + 2 x 2 = 

700 + 4 = 704

Forgot to multiply 70 x 2 and 10 x 2

100

___ x 35 is about 700

what is 20

200

23 x 52 = 

What is 1,196

200

2,368 divided by 32 =

What is 74

200

1,070 divided by 5 = 212

5 x 200 = 1,000          200 + 10 + 2 = 212

5 x 10 = 50

5 x 2 = 20 

5 x 2 does not equal 20

200

About how many 5's does it take to make 404

what is 80 

300

340 x 15 =

What is 5,100

300

3,426 divided by 8 = 

What is 428 Remainder 2 or 428.25 or 428  1/4 (2/8)

300

34 x 82 = 2,908

30 x 80 = 2,400         2,400 + 240 + 60 + 8 =

30 x 2 = 60                2,840 + 68= 2,908

80 x 4 = 240

4 x 2 = 8

80 x 4 = 320  and 2,400 + 240 = 2,640

300

800 divided by ___ will get to 20

What is 40

400

____ x 32 = 800

What is 25

400

225 divided by ____ = 75

what is 3

400

522 divided by 6 =83 

6 x 10 = 60           522 - 60 = 442

6 x 20 = 120            442 - 120 = 322

6 x 50 = 300          322 - 300 = 22

6 x 3 = 18           22 - 18 = 4


522 - 60 = 462

400

2,604 divided by 42, 

____ x 42 will get close to 2,600?

42 x 60

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