1. Solving Multiplication and Division Problems
Mini Boards
Solving Multiplication and Division Problems

2. What strategy should we use to solve the following problem? Why?
239 × 9

3. Compensation
Because we are multiplying by 9.

4. What strategy should we use to solve the following problem? Why?
5 × 14

5. Double one, Halve the other
When we double one, and halve the other, the problem becomes easier:
10 x 7

6. What strategy should we use to solve the following problem? Why?
12 × 8

7. Repeated Doubling
Because we are multiplying by 8. So, it is easier to double 3 times.

8. What strategy should we use to solve the following problem? Why?
56 ÷ 8

9. Reversing
Because turning the problem into a multiplication problem makes it simpler:
___ x 8 = 56

10. What strategy should we use to solve the following problem? Why?
200 × 8

11. Using Known Facts
Because the number 200 has zeros in it. So this strategy is the fastest.

12. What strategy should we use to solve the following problem? Why?
416 × 6

13. Partitioning
We are not x4, x8, x9, or x11. It is easier to break the number down into part using place values.

14. Gallery You will find problems around the room Choose 5
For each problem:
Write the division problem on your tracking sheet in the suitable strategy box.
2. Explain why did you choose this strategy

15. What strategy should we use to solve the following problem? Why?
4 × 20

16. What strategy should we use to solve the following problem? Why?
5 × 18

17. What strategy should we use to solve the following problem? Why?
13 × 8