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

2. Multiplying Fractions
Rule: When multiplying fractions, multiply straight across!
Multiply the numerators and multiply the denominators
Simplify, if needed
Example: • =

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

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

5. Let’s Check Our Answers!
Find the product. Write in simplest form.
2 5 • ) • ) −1 4 • ) • 3 2 3
= 10 ÷10 40 ÷10 = = 40 ÷ 54 ÷ = = −2 ÷2 28 ÷2 = − = • 11 3
= = =5 1 2