To multiply fractions, multiply their numerators and then multiply their denominators. Reduce!

Multiplying Rational Numbers (Fractions)

For example,

3

2

6

5

36

25

9

5

18

10

Or reduce before you multiply,

3

2

6

5 1

3

33

15

9

5

To multiply mixed numbers, change them to improper fractions first. Then multiply.

Multiplying Mixed Numbers

For example,

5

31

6

52

53

417

15

84

5

8

6

17 4

3

15

68

Evaluate if: 3 2 7, 2 ,8 9 10

x y z

.)5a x

358

5 3

1 8

15

8

.)b yz2 729 10

20 7

9 10

1

-2

14

9

The Willis Tower in Chicago is about 1450 feet tall. The Empire State Building in New York is about 4/5 as tall.

About how tall is the Empire State Building?

1450 4

1 5

290

1

1,160 feet

Conversions

• Given the larger unit of measure and need to find the small unit of measure you multiply

Complete Each Conversion3

?4

ounces pound

1 16pound ounces

16 3

1 4

1

4

12ounces

5?

6foot inches

1 12foot inches5 12

6 1

1

2

10inches

Homework

Page 110 (16-48) even