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4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
4 Rules of Fractions
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4 Rules of Fractions

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

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

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  • the very last answer was meant to be 13 over 10 though but good u guyz..thnx
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Transcript

  • 1. FRACTIONS
    • This presentation will help you to:
    • add
    • subtract
    • multiply and
    • divide fractions
  • 2. Adding fractions
    • To add fractions together the denominator (the bottom bit) must be the same.
    • Example
  • 3. Adding fractions
    • To add fractions together the denominator (the bottom bit) must be the same.
    • Example
  • 4. Adding fractions
    • To add fractions together the denominator (the bottom bit) must be the same.
    • Example
  • 5. Now try these
    • Click to see the next slide to reveal the answers.
    • 1 . 2 .
    • 3 . 4 .
  • 6. Now try these
    • 1 . 2 .
    • 3 . 4 .
  • 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 .
  • 18. Dividing fractions Once you know a simple trick, dividing is as easy as multiplying!
    • Turn the second fraction upside down
    • Change the divide to multiply
    • Then multiply!
  • 19. Dividing fractions
    • Turn the second fraction upside down
    Example
  • 20. Dividing fractions
    • Turn the second fraction upside down
    Example
    • Change the divide into a multiply
  • 21. Dividing fractions
    • Turn the second fraction upside down
    Example
    • Change the divide into a multiply
    • Then multiply
  • 22. Dividing fractions
    • Turn the second fraction upside down
    Example
    • Change the divide into a multiply
    • Then multiply
  • 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 .
  • 25. Common denominators
    • To add or subtract fractions together the denominator (the bottom bit) must be the same.
    So, sometimes we have to change the bottoms to make them the same. In “maths-speak” we say we must get common denominators
  • 26. Common denominators
    • To get a common denominator we have to:
    1. Multiply the bottoms together. 2. Then multiply the top bit by the correct number to get an equivalent fraction
  • 27. Common denominators
    • For example
  • 28. Common denominators
    • For example
    • Multiply the bottoms together
  • 29. Common denominators
    • For example
    2. Write the two fractions as sixths
  • 30. Common denominators
    • For example
    To get ½ into sixths we have multiplied the bottom (2) by 3. To get an equivalent fraction we need to multiply the top by 3 also
  • 31. Common denominators
    • For example
    To get ½ into sixths we have multiplied the bottom (2) by 3. To get an equivalent fraction we need to multiply the top by 3 also
  • 32. Common denominators
    • For example
    To get 1/3 into sixths we have multiplied the bottom (3) by 2. To get an equivalent fraction we need to multiply the top by 2 also
  • 33. Common denominators
    • For example
    To get 1/3 into sixths we have multiplied the bottom (3) by 2. To get an equivalent fraction we need to multiply the top by 2 also
  • 34. Common denominators
    • For example
    We can now rewrite
  • 35. Common denominators
    • For example
    We can now rewrite
  • 36. Common denominators
    • For example
    We can now rewrite
  • 37. Common denominators
    • For example
    We can now rewrite
  • 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 .
  • 44. For further info
    • Go to:
    • BBC Bitesize Maths Revision site
    • by clicking here:

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