Fractions Cancelling Down

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Fractions Cancelling Down

  1. 1. FRACTIONS <ul><li>This presentation will help you to cancel down fractions to show them in their lowest form. </li></ul>Left click on the mouse to reveal the next section
  2. 2. Cancelling fractions <ul><li>To simplify fractions we cancel down to make them easier to work with. </li></ul>To cancel we have to divide the top and bottom numbers of a fraction by the same number
  3. 3. Cancelling fractions <ul><li>Example </li></ul>Cancel this fraction First, find the largest number that will go into 4 and 8 4
  4. 4. Cancelling fractions Next, we divide the top and the bottom by 4
  5. 5. Cancelling fractions So, No other number will divide in to the top or bottom so this is its lowest form . We say that the fractions are equivalent .
  6. 6. Cancelling fractions We can also cancel in steps Example Divide by 5 Divide by 5
  7. 7. Summary These fractions are all equivalent fractions   The fractions   For example     We cannot cancel down any further - so we can stop (it is known as the lowest form ). can be cancelled down to
  8. 8. Now try these Click on the mouse to reveal the answers. 1 . 2 . 3 . 4. 5 . 6 .
  9. 9. Now try these Click on the mouse to reveal the answers. In a group of 500 people 40 have green eyes. What fraction of the total has green eyes? Divide by 10 Divide by 2
  10. 10. Now try these Click on the mouse to reveal the answers. A total of 60 cars were repaired by a garage in a month. 15 of them were Vauxhalls. What fraction of the total number repaired were Vauxhalls? Divide by 5 Divide by 3
  11. 11. For further info <ul><li>Go to: </li></ul><ul><li>BBC Bitesize Maths Revision site </li></ul><ul><li>by clicking here: </li></ul>

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