1. Relate Multiplication and Division
How can you use multiplication to divide?

2. 45 + __ = 79

3. How could you solve this?
45 + __ = 79
How could you solve this?

4. Use the inverse (or opposite) operation.
45 + __ = 79
Use the inverse (or opposite) operation.

5. Use the inverse (or opposite) operation.
45 + __ = 79
Use the inverse (or opposite) operation. 79
-45 34

6. Use the inverse (or opposite) operation.
= 79
Use the inverse (or opposite) operation. 79
-45 34

7. You can do the same with multiplication and division.
Multiplication and division are inverse (or opposite) operations.

8. 20 ÷ 4 = _____ Modeling with drawings/counters
You have already learned to solve this problem by:
Modeling with drawings/counters
Modeling with bar models
Using repeated subtraction
Using repeated subtraction on a number line
Modeling with an array

9. Today we are going to use multiplication to help us.
20 ÷ 4 = _____
Today we are going to use multiplication to help us.

10. 20 ÷ 4 = _____
is the same thing as
4 x ____ = 20

11. 20 ÷ 4 = _____ 4 x ____ = 20 is the same thing as
If you don’t know how many groups of 4 make 20, use an array…

12. 20 ÷ 4 = _____ 4 x ____ = 20 is the same thing as
If you don’t know how many groups of 4 make 20, use an array… 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

13. 20 ÷ 4 = _____ 4 x ____ = 20 is the same thing as
If you don’t know how many groups of 4 make 20, use an array… 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 5

14. 5 20 ÷ 4 = _____ 4 x ____ = 20 is the same thing as
If you don’t know how many groups of 4 make 20, use an array… 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 5

15. 5 5 So, 20 ÷ 4 = _____ 4 x ____ = 20 is the same thing as
If you don’t know how many groups of 4 make 20, use an array… 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 5

16. How can you use multiplication to divide?

17. Exit Ticket Which equation could help you solve 14 ÷ 2 = k?
Write a multiplication equation that could help you find the quotient of 15 ÷ 5.