1. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Chapter 3 Fractions

2. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. 3.3 Multiplying and Dividing Fractions

3. 33 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Multiplying Fractions To multiply two fractions, multiply the numerators and multiply the denominators. If a, b, c, and d represent positive whole numbers we have

4. 44 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Examples Multiply. a. b. c.

5. 55 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Examples Multiply and simplify. a. b.

6. 66 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Example An estimate for the measure of an adult’s wrist is of the waist size. If Jorge has a 34-inch waist, estimate the size of his wrist. Jorge’s wrist is about inches.

7. 77 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Finding Reciprocals of Fractions DefinitionExample Reciprocals: Two numbers are reciprocals of each other if their product is 1. Reciprocal of a fraction: To find the reciprocal of a fraction, interchange its numerator and denominator.

8. 88 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Examples Find the reciprocal of each number. a. b. c.

9. 99 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Dividing Fractions

10. 10 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Examples Divide and simplify. a. b.

11. 11 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Example If x = 7/8 and y = ‒ 1/3 evaluate (a) xy and (b) x ÷ y. a.b.

12. 12 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Example Cedar Point is an amusement park located in Sandusky, Ohio. Its collection of 68 rides is the largest in the world. Of the rides, 4/17 are roller coasters. How many roller coasters are in Cedar Point’s collection of rides. 1. Understand. Read and reread the problem. We are told that 4/17 of the rides are roller coasters. The word “of” means multiplication.

13. 13 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Example-continued 2. Translate. number of roller coasters is 4/17 of total rides at Cedar Point 3. Solve. 4. Interpret. The number of roller coasters at Cedar Point is 16.