1. Multiplying & Dividing
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Multiplying & Dividing
Fractions

2. Multiplying & Dividing
24 November 2018
Multiplying & Dividing
Fractions

3. 4 3
3 x 4 = 12

4. 1 3 x 1 2 =
1 2
1 3
1 6

5. 1 3 x 1 4 =
1 4
1 3
1 12

6. 2 3 x 3 4 =
3 4
2 3
6 12

7. Model these calculations in your book:
1 3 x 1 4 =
2 3 x 2 5 =
1 5 x 1 4 =
3 5 x 6 7 =
1 6 x 3 4 =
3 7 x 4 9 =

8. 1 3 1 3 1 9 (1x1) =1 =9 (3x3) To multiply fractions:
Multiply the numerators.
Multiply the denominators.
(1x1) =1
1 3
1 3
1 9
EXAMPLE 1: =9
(3x3)

9. (1x2) =2
1 4
2 5
2 20
1 10
EXAMPLE 2:
=20
(4x5)

10. (2x3) =6
2 5
3 7
6 35
EXAMPLE 3:
=35
(5x7)

11. Level 1 Level 2 Extension 1 2 x 1 5 = 1 10 1 5 x 3 5 = 3 25
Multiply the fractions.
Write the question AND answer.
Level 1
Level 2
Extension
1 2 x = 1 10
1 5 x = 3 25
x =
x =
2 3 x = = 1 2
4 9 x = = 10 27
x = = 1 9
x =
4 6 x = = 4 15
x =
x = = 12 39
x =
6 8 x = = 27 48
7 4 x = = 7 12
x =
x = 8 55
x = = 6 25
x = = 2 5

13. How many eighths go into one quarter?
Division
24 ÷ 4 = 12
How many 4s go into 24? 6
1 4 ÷ 1 8 =
How many eighths go into one quarter?

14. 2 1 4 ÷ 1 8 = How many eighths go into one quarter?

15. 4 2 5 ÷ 1 10 = How many tenths go into two fifths?
1 5
1 5
1 10
1 10
1 10
1 10
4 tenths go into one fifth.

16. 3/4 1 4 ÷ 1 3 = How many thirds go into a quarter?
Only of one third goes into a quarter.

17. 4 5 ÷ 2 3 = 1 2 10 How many two-thirds go into four-fifths?
1 and a two-tenth two-thirds go into four-fifths.

18. Model these calculations in your book:
2 3 ÷ 1 6 =
2 3 ÷ 1 6 =
3 5 ÷ 1 10 =
1 3 ÷ 4 6 =
4 7 ÷ 1 14 =
7 8 ÷ 1 4 =

19. 1 3 1 2 ? ? 1 1 2 1 2 3 1 3 2 To divide fractions: EXAMPLE 1 KEEP
CHANGE
FLIP
1 1 2
1 2
3 1
3 2

20. 2 4 1 3 ? ? 2 3 1 3 4 2 4 6 To divide fractions: EXAMPLE 2 KEEP CHANGE
FLIP
2 3
1 3
4 2
4 6

21. 4 6 2 5 ? ? 3 5 2 5 6 4 12 20 To divide fractions: EXAMPLE 3 KEEP
CHANGE
FLIP
3 5
2 5
6 4
12 20

22. Write the question AND answer.
Divide the fractions.
Write the question AND answer.
Level 1
Level 2
Extension
1 2 ÷ = 5 4
2 7 ÷ =
÷ =
1 3 ÷ = 3 6 = 1 2
÷ = 9 70
÷ =
3 4 ÷ =
÷ =
÷ = = 11 25
5 6 ÷ =
5 6 ÷ =
÷ =
2 4 ÷ =
÷ =
÷ =