Multiplying and Dividing Rational Numbers COURSE 3 LESSON 4-5 Multiplying and Dividing Rational Numbers Find ÷ . 5 6 7 12 5 6 7 12 ÷ = • Multiply by the reciprocal of . Multiply the numerators and the denominators. 5 • 12 6 • 7 = Divide numerator and denominator by the GCF, 6. = 5 • 12 6 • 7 1 2 Simplify. = 10 7 3 = 1 4-5

Multiplying and Dividing Rational Numbers COURSE 3 LESSON 4-5 Multiplying and Dividing Rational Numbers One bow takes yds of ribbon. How many bows could you make from a roll of ribbon that is 12 yds long? 3 4 1 2 You can use logical reasoning to solve this problem. You need to find how many -yd pieces there are in 12 yds. 3 4 1 2 Divide 12 by . 3 4 1 2 Write the mixed number as an improper fraction. 25 2 12 ÷ = ÷ 3 4 1 Multiply by the reciprocal of . 25 2 4 3 = • 4-5

Multiplying and Dividing Rational Numbers COURSE 3 LESSON 4-5 Multiplying and Dividing Rational Numbers (continued) Divide numerator and denominator by the GCF, 2. 25 2 4 3 = • 1 Multiply. Write the fraction as a mixed number. = = 16 50 3 2 Since you cannot make of a bow, you can make 16 bows. 2 3 4-5