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Dividing Fractions

Dividing Fractions. MEAP REVIEW. Objectives. Students will be able to: Find reciprocals of given fractions Divide Fractions, whole numbers and mixed numbers by fractions Solve real world problems involving dividing fractions. To Divide Fractions:. Rewrite the first fraction.

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Dividing Fractions

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  1. Dividing Fractions MEAP REVIEW

  2. Objectives • Students will be able to: • Find reciprocals of given fractions • Divide Fractions, whole numbers and mixed numbers by fractions • Solve real world problems involving dividing fractions

  3. To Divide Fractions: • Rewrite the first fraction. • Change the division sign to a multiplication sign. • Flip the second fraction upside down (Find the reciprocal!!!). • Follow the steps to Multiply Fractions.

  4. Finding the Reciprocal • When you flip the second fraction, you are writing that fraction’s reciprocal. 3 5 5 3

  5. Finding Reciprocals 13 2 6 5 = = 6 5 2 13

  6. ÷ Example 1 1 1 2 3 Rewrite: 1 2 2 x = 1 3 3

  7. ÷ Example 2 4 4 5 9 Rewrite: 1 4 9 9 4 1 x = = 4 1 5 5 5

  8. ÷ Example 3 12 3 5 1 Rewrite: 20 4 12 5 20 x = = 1 1 3 1

  9. ÷ Example 4 1 2 6 1 Rewrite: 1 1 1 x = 6 2 12

  10. Remembering How to Divide Fractions: Use this Limerick ♫ "Dividing fractions, as easy as pie,Flip the second fraction, then multiply." ♫

  11. Dividing Mixed Numbers

  12. Strategy: • Change mixed numbers into improper fractions. • Instead of dividing, multiply by the reciprocal. • Factor when possible, multiply, and put your answer in simplest form.

  13. Example 1 6 2 2 2 ÷ 5 7 32 16 ÷ 7 5 2 14 32 7 4 2 = = x 5 5 16 1 5

  14. Example 2 1 6 1 2 ÷ 9 3 10 20 ÷ 3 9 1 10 3 1 1 x = 2 20 3 9 6

  15. Example 3 8 5 1 ÷ 13 105 5 ÷ 1 13 1 8 1 = 21 21 105 x = 13 13 13 5 1

  16. Video Time • Dividing Fractions • Dividing Mixed Numbers

  17. Classwork: Try these Visual models to help you learn Division with fractions. See if you can guess with whole numbers!

  18. Classwork: Visit the Visual Fractions modeling mixed number site. Homework: Dividing Fractions HO

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