Page 82 - Math Course 1 (Book 1)

Solving Fractions

Mo. 2

Lesson 6 Multiply Negative Fractions

Example

KEY CONCEPTS:
1. Multiple positive and negative fractions. Find - 1 2 Write the product in simplest
7
4
2. Use dimensional analysis to solve form.
problems. 1 2 1 2 1
- = Divide 2 and 4 by their GCF, 2.
4 7 4 7
2
MO. 2 - L6a =- 1 1 Multiply the numerators and
2 7 multiply the denominators.
Multiplying Rational
Numbers Answer -- 1 Simplify

14
Key Concept

Multiply Mixed Numbers
Multiplying Fractions
Example
Words To multiply fractions, multiply the numerators
and multiply the denominators.
Find 1 1 • 3 2 Write the product in simplest
Symbols a c = a c , where b, d = 0 form. 2 3
b d b d 1 3
1
1 1 3 2 = 3 11 Rename as and
2
2
1 2 1 2 2 2 3 2 3
Example = or 2 11
3 5 3 5 15 rename as
3
3 3
1 3 11
= Divide by the GCF, 3.
2 3 1
Let’s Begin = 1 11 Multiply.
2 11

11 1
Answer or 5 Simplify.
Multiply Fractions 2 2

Example Your Turn!

Multiply Fractions
2 5 Find Write the product in simplest form
5 8 Write Repeating Decimals as Fractions
3 2
2 5 = 2 5 Multiply the numerators. Find 8 9 Write the product in simplest form.
5 8 5 8 Multiply the denominators.
A. 5 C. 1
72 12

6 6
B. D.
10 1 Simplify. The GCF of 72 63
Answer or
40 4 10 and 40 is 10.
Answer

74