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Fractions Year 4 www.KeyStage2Maths.com.

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Presentation on theme: "Fractions Year 4 www.KeyStage2Maths.com."— Presentation transcript:

1 Fractions Year 4

2

3 1 4 2 4 one quarter two quarters 1 2 one half

4 1 2 2 4 =

5 2 6 3 6 1 6 three sixths two sixths one sixth 1 2 one half

6 1 2 3 6 = 1 2 2 4 3 6 = =

7 4 8 1 8 3 8 2 8 1 2 four eighths two eighths one eighth three eighths
one half

8 1 2 4 8 = 1 2 2 4 3 6 4 8 = = =

9 2 3 1 5 4 10 1 2 one tenth five tenths four tenths two tenths
three tenths 10 1 2 one half

10 1 2 5 = 10 1 2 2 4 3 6 4 8 5 = = = = 10

11 x2 x3 x4 x5 1 2 2 4 3 6 4 8 5 = = = = 10 x2 x3 x4 x5

12 ÷2 ÷3 ÷4 ÷5 1 2 2 4 3 6 4 8 5 = = = = 10 ÷2 ÷3 ÷4 ÷5

13

14 Write these fractions in order, smallest first.
1 5 1 4 1 8 1 8 1 5 1 4

15 1 8 1 5 1 4

16 Write these fractions in order, smallest first.
3 4 3 6 3 8 3 8 3 6 3 4

17 3 8 3 6 3 4

18

19 1 2 3

20 1 2 1 2 1 2 1 1 2 2 3

21 1 3 2 3 1 3 2 3 1 3 2 3 1 1 1 2 2 2 3

22 1 4 2 4 3 4 1 4 2 4 3 4 1 4 2 4 3 4 1 1 1 1 2 2 2 2 3 1 2 1 2 1 2 1 1 2 2 3

23 1 4 1 2 3 4 1 4 1 2 3 4 1 4 1 2 3 4 1 1 1 1 2 2 2 2 3

24 1 4 1 2 3 4 1 4 1 2 3 4 1 4 1 2 3 4 1 1 1 1 2 2 2 2 3

25

26 4 1 + = 1 5 5 When the numbers in the numerator add to make the number in the denominator, you have a whole.

27 5 3 + = 1 8 8

28 7 5 + = 1 12 12

29 2 3 - 1 = 5 5 When subtracting from a whole, the denominator is the same as for the fraction you subtract (e.g. 5), and the numerator is the denominator of that fraction minus the numerator (e.g. 5-2=3).

30 1 5 - 1 = 6 6

31 7 5 - 1 = 12 12

32

33 Half of 48 = 24 Half of 24 = A quarter is half of a half. 12 So a quarter of 48 is 12. You can find an eighth by halving once more. Half of 12 = 6 So an eighth of 48 is 6.

34 Half of 32 = 16 Half of 16 = A quarter is half of a half. 8 So a quarter of 32 is 8. You can find an eighth by halving once more. Half of 8 = 4 So an eighth of 32 is 4.

35

36 To find we divide by 5, then multiply by 2.
1 5 To find we divide by 5. 2 5 To find we divide by 5, then multiply by 2. 1 6 To find we divide by 6. 5 6 To find we divide by 6, then multiply by 5. 1 8 To find we divide by 8. 3 8 To find we divide by 8, then multiply by 3.

37 What is 2/5 of 30? 30 ÷ 5 = 6 6 x 2 = 12

38 What is 5/6 of 24? 24 ÷ 6 = 4 4 x 5 = 20

39 What is 3/8 of 24? 24 ÷ 8 = 3 3 x 3 = 9


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