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Fraction Multiplication

Fraction Multiplication

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Fraction Multiplication

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  1. Fraction Multiplication And Cancelation

  2. Fraction Multiplication • Here are some fraction multiplication problems • Can you tell how to multiply fraction from these examples?

  3. Multiplication • Multiply numerator by numerator • And denominator by denominator

  4. Try some. • Multiply the following:

  5. Answers • Multiply the following:

  6. Mixed Numbers • Because of the order of operations, • Mixed numbers cannot be multiplied as is • Change mixed numbers to improper fractions, then multiply.

  7. Try some • Change any whole or mixed numbers to improper. • Multiply straight across. • Simplify answers

  8. Answers • Change any whole or mixed numbers to improper. • Multiply straight across. • Simplify answers

  9. Cancelling Reduce before you multiply

  10. Canceling • Reducing before mutiplying is called canceling. • ICK! Instead think the following in your head.

  11. Canceling on paper • Rules: One factor from any numerator cancels with like factor from the denominator.

  12. Try one • Say “--- goes into ____ this many times.” • As you cross each number out and write what is left after canceling above the number.

  13. Answer • Say “--- goes into ____ this many times.” • As you cross each number out and write what is left after canceling above the number.

  14. Try one more • Make whole and mixed numbers improper • Cancel if you can • Multiply Numerators and denominators straight across. • Simplify

  15. Answer • Make whole and mixed numbers improper • Cancel if you can • Multiply Numerators and denominators straight across. • Simplify