Multiply
Divide
Estimate
Multiply by 10s
Order of Ops
100

32 x 12

384

100

85 divided by 24

3 R 13

100

Estimate 34 x 27

30 x 30 =900

100

24 x 10

240

100

3  + 5 - 1

7

200

63 x 42

2646

200

980 divided by 10

98

200

Estimate 835 x 94

800 x 100 or 80,000

200

29 x 200

5,800

200

8 x 4 - 3

29

300

87 x 54

4698

300

742 ÷ 31

23 r 29

300

3,456 divided by 27

3,000 ÷ 30 = 100

3,300 ÷ 30 = 110

300

39 x 4,000


156,000

300

48 ÷ 8 + 22 x 3

72

400

838 x 24

20, 112

400

814 ÷ 13

62 R 8

400

Tickets for a musical are $28. 725 people attended the musical. About how much money was paid for tickets in total?

30 x 700 = $21,000

28 x 700 = $19,600

400

267 x 300

80,100

400

I start with 5. I multiply by 12. Then I subtract 4. Finally I add 9. What number am I?

65

500

2,431 x 14

34,034

500

3,876 ÷ 74

52 R 28

500

There are 8, 668 pieces of popcorn and 24 hungry students. About how many pieces of popcorn does each student get?

8, 600 ÷ 20 =430 pieces of popcorn per student

9,000 ÷ 20 = 450 pieces of popcorn per student

8,500 ÷ 20= 425 pieces of popcorn per student

500

Each year has 365 days. How many days are in a decade? A decade has 10 years.

3,650 days

Must have days to count.

500

5 + 88 ÷ ( 4 + 7 ) - 3 

10

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