Topic 9 Review!

Mental Math Division

100

160 ÷ 4 =

40

200

900 ÷ 3 =

300

300

630 ÷ 9 =

70

400

720 ÷ 8 =

90

500

At the North American Challenge, teams use up to 1,000 solar cells to design and build solar cars for a race. If there are 810 solar cells in 9 rows, how many solar cells are in each row?

90 solar cells

Estimating Quotients

100

Find the ESTIMATE

44 ÷ 5 =

45 ÷ 9 = 5

200

Find the ESTIMATE

620 ÷7 =

630 ÷ 7 = 90

300

Find the ESTIMATE

813 ÷ 8 =

800 ÷ 8 = 100

400

Find the ESTIMATE

232 ÷ 9 =

270 ÷ 9 = 30

500

Find the ESTIMATE

599 ÷ 9 =  

540 ÷ 9 = 60

Estimating Bigger Quotients

100

Find the ESTIMATE

212 ÷ 7 =

210 ÷ 7 = 3

200

Find the ESTIMATE

497 ÷ 8 =

480 ÷ 8 = 60

300

Find the ESTIMATE

3,688 ÷ 6 = 

3,600 ÷ 6 = 600

400

Find the ESTIMATE

2,013 ÷ 5 =

2,000 ÷ 5 = 400

500

Find the ESTIMATE

5,684 ÷ 9 = 

5,400 ÷ 9 = 600

Dividing with Remainders

100

26 ÷ 5 = 

5 R 1

200

30 ÷ 4 = 

7 R 2

300

35 ÷ 8 = 

4 R 3

400

39 ÷ 7 = 

5 R 4

500

86 ÷ 9 =

9 R 7

More Dividing with Remainders

100

17 ÷ 3 =

3 R 2

200

37 ÷ 5 =

7 R 2

300

28 ÷ 6 = 

4 R 4

400

61 ÷ 8 =

7 R 5

500

55 ÷ 9 =

6 R 1