to multiply fractions, multiply their numerators and then multiply their denominators. reduce!...
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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
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