Chapter 5-4 Multiplying Rational Numbers UNIT 2 Chapter 5-4 Multiplying Rational Numbers

Multiplying Fractions Rule: When multiplying fractions, multiply straight across! Multiply the numerators and multiply the denominators Simplify, if needed Example: 3 4 • 5 6 = 15 25

Multiplying Mixed Numbers Rule: Change the mixed number into an improper fraction Multiply straight across Simplify, if needed Example: 3 1 2 • 4 2 3 {Change mixed number to improper fractions| = 7 2 • 14 3 {Multiply numerators and denominators} = 98 6 = 16 {Divide back into mixed number} = 16 1 3 {Simplify} 2 3

Let’s Try Some Examples Find the product. Write in simplest form. 1) 2 5 • 5 8 2) 8 9 • 5 6 3) −1 4 • 2 7 4) 1 1 2 • 3 2 3

Let’s Check Our Answers! Find the product. Write in simplest form. 2 5 • 5 8 2) 8 9 • 5 6 3) −1 4 • 2 7 4) 1 1 2 • 3 2 3 = 10 ÷10 40 ÷10 = 1 4 = 40 ÷ 54 ÷ = 20 27 = −2 ÷2 28 ÷2 = −1 14 = 3 2 • 11 3 = 33 6 = 5 3 6 =5 1 2