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2.4

Multiplying Fractions and Mixed Numbers. 2.4. Multiplying Fractions. Multiplying Fractions To multiply two fractions, multiply the numerators and multiply the denominators. If a, b, c, and d represent positive whole numbers we have. P 141-142. Examples. Multiply. a. b. c.

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2.4

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  1. Multiplying Fractions and Mixed Numbers 2.4

  2. Multiplying Fractions Multiplying Fractions To multiply two fractions, multiply the numerators and multiply the denominators. If a, b, c, and d represent positive whole numbers we have P 141-142

  3. Examples Multiply. a. b. c. P 141-142

  4. Examples Multiply and simplify. a. b. P 141-142

  5. Multiplying Fractions No common factors No common Factors P 141-142

  6. Multiplying Fractions P 142

  7. Multiplying Fractions and Mixed Numbers or Whole Numbers Multiplying Fractions and Mixed Numbers of Whole Numbers To multiply with mixed numbers or whole numbers, first write any mixed or whole numbers as fractions and then multiply as usual. P 143

  8. Examples Multiply. a. b. P 143

  9. Example Multiply. P 143

  10. Multiplying Fractions and Mixed Numbers or Whole Numbers P 143-144

  11. Example Multiply. Check by estimating. Let’s check by estimating. rounds to 2, rounds to 1, and 2 · 1 = 2. The estimate is close to the exact value, so our answer is reasonable. P 144

  12. Example An estimate for the measure of an adult’s wrist is of the waist size. If Jorge has a 34-inch waist, estimate the size of his wrist. Jorge’s wrist is about inches. P 145

  13. Solving Problems by Multiplying Fractions Practice Problem 14 similar About 1/3 of all plant and animal species in the United States are at risk of becoming extinct. There are 20,439 known species of plants and animals in the United States. How many species are at risk of extinction? SOLUTION P145

  14. DONE

  15. DONE

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