math fractions

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math fractions

  1. 1. a Mary rose Chan & Aly ssa Gallano Pro duc tion 8 - 73
  2. 2. <ul><li>Maryrose and I decided on making a wikispace for our un-project. All the information will be here and there will be come questions for you to answer. Its something like the wikispace we made for our parents, for the conferences . </li></ul>
  3. 3. con tents <ul><li>Mult iply ing fr ac tions </li></ul><ul><li>Ans wer th is ques tion </li></ul><ul><li>Mult iply ing fr ac tions w ith a wh ole num ber </li></ul><ul><li>Ans wer th is ques tion </li></ul><ul><li>Multiply ing fract ions : cr oss red uce </li></ul>
  4. 4. Mult iply ing fr ac tions
  5. 5. <ul><li>One of the biggest mistakes people make when they are multiplying fractions is that they cross-multiply. The trick is to multiply across. </li></ul>
  6. 6. <ul><li>Remember, fractions with any whole number over one still equals the original amount. </li></ul>Contents
  7. 7. <ul><li>What about the common denominator? What about it? You don't need common denominators when you multiply fractions. </li></ul>
  8. 8. Ans wer th is ques tion <ul><li>Multiply the following fractions. Put them in they're lowest terms and in pictorial form. </li></ul>
  9. 9. <ul><li>Mult iply ing fr ac tions w ith a wh ole num ber </li></ul>
  10. 10. <ul><li>First, multiply the whole number with the denominator. This is the same method used if both fractions had whole numbers. </li></ul><ul><li>Keep the denominator from the old fraction. </li></ul>
  11. 11. <ul><li>Put the new fraction into its lowest terms. </li></ul>
  12. 12. Ans wer th is ques tion <ul><li>Multiply the following fractions. Put them in they're lowest terms and in pictorial form. </li></ul>
  13. 13. Multiply ing fract ions : cr oss red uce
  14. 14. W hy w e cr oss re duce <ul><li>It makes reducing large numbers easier. </li></ul><ul><li>It is a faster way to get to the lowest terms of a fraction. </li></ul>
  15. 15. H ow t o cr oss re duce <ul><li>Put each number into lowest terms </li></ul>
  16. 16. <ul><li>T he e nd </li></ul>Please check the next PowerPoint presentation on divid ing frac tions

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