The four rules - adding, subtracting, division and multiplication - with fractions

7. Subtracting fractions To subtract fractions the denominator (the bottom bit) must be the same. Example

8. Subtracting fractions To subtract fractions the denominator (the bottom bit) must be the same. Example

9. Subtracting fractions To subtract fractions the denominator (the bottom bit) must be the same. Example

10. Now try these Click on the next slide to reveal the answers. 1 . 2 . 3 . 4 .

11. Now try these . 1 . 2 . 3 . 4 .

12. Multiplying fractions To multiply fractions we multiply the tops and multiply the bottoms Top x Top Bottom x Bottom

13. Multiplying fractions Example

14. Multiplying fractions Example

15. Multiplying fractions Example

16. Now try these Click on the next slide to reveal the answers. 1 . 2 . 3 . 4 .

17. Now try these . 1 . 2 . 3 . 4 .

23. Now try these Click on the next screen to reveal the answers. 1 . 2 . 3 . 4 .

24. Now try these 1 . 2 . 3 . 4 .

38. Common denominators This is what we have done: 1. Multiply the bottoms

39. Common denominators This is what we have done: 1. Multiply the bottoms 2.Cross multiply

40. Common denominators This is what we have done: 1. Multiply the bottoms 2.Cross multiply

41. Common denominators This is what we have done: 1. Multiply the bottoms 2.Cross multiply

42. Now try these Click on the next slide to reveal the answers. 1 . 2 . 3 . 4 .

43. Now try these 1 . 2 . 3 . 4 .