1. 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
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2. 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 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 yds. 3 4 1 2
Divide 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
= •
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3. 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
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