Dividing Fractions

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Dividing Fractions

  1. 1. Dividing Fractions The opposite of multiplying fractions
  2. 2. Multiply these fractions <ul><li>Don’t forget to reduce to simplest form when necessary </li></ul>
  3. 3. What’s the opposite of addition? Subtraction, of course
  4. 4. What’s the opposite of multiplication? Remind yourself that when multiplying fractions, make them look like opposites. Here’s how… Division
  5. 5. If you were to multiply these two fractions. <ul><li>You would multiply the top </li></ul><ul><li>Then you’d multiply the bottom </li></ul><ul><li>BUT to divide these two fractions, you rewrite to make division look opposite. </li></ul>opposite opposite
  6. 6. Let’s take a closer look. <ul><li>Compare the first fraction in each statement. </li></ul><ul><li>How has the SECOND fraction been changed? </li></ul><ul><li>RULE: To divide fractions, rewrite into a multiplication statement flipping the second fraction. </li></ul>opposite opposite
  7. 7. Let’s see what happens <ul><li>If this is correct, then this should work… </li></ul>2 -8 1 Divide top and bottom by three
  8. 8. Let’s start by rewriting division as multiplication. <ul><li>Remember, you can make whole numbers into fractions using one on the bottom. </li></ul>
  9. 9. Let’s rewrite division as multiplication on the first three problems from your worksheet. <ul><li>Now just multiply and simplify the new problem. </li></ul>
  10. 10. Complete WS F5

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