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# Download 18 = ⋅ 32 = 8 ⋅ 56 = 18 2 6 3 4 5 3 ⋅ 6 = 18 4 ⋅ 12 = 48 ⋅ 6 = 2

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```Name
3-13
Date
1
Use benchmarks of 0, __
, and 1 to estimate the sum or
2
difference. Then find the actual sum or difference.
5 + __
4
1. ___
10
13 â __
3
2. ___
14
9
1
Estimate:
85
17
___
or ___
Sum: 90
18
1
__
Estimate:
2
1
__
2
Difference:
8 â __
7
3. __
9
7
13 + __
3
4. ___
8
14
0
1
___
Estimate:
2
Estimate:
72
Difference:
4
Sum:
19
1___
28
Write an equation. Then solve. Equations may vary.
5. A rectangle has an area of 20 square feet and a length of
6 feet. What is its width?
1
6 â w = 20; 3 __
feet
3
6. Bailey attends gymnastics practice for 8 hours each week.
1
the number of hours that the gym is open for
This is __
4
practice. How many hours is the gym open for practice?
1
__
â a = 8; 32 hours
4
Solve.
1 Ã· =
7. __
3
4
1
___
12
1
8. __
â3=
4
3
__
4
1 =
9. 14 â __
6
1
2 __
3
Â© Houghton Mifflin Harcourt Publishing Company
1 Ã·
5 different
10. Stretch Your Thinking How is solving __
8
1
from solving __ â 5?
8
1 Ã·
1
5, multiply __
by
8
8
1 __
1.
1
the reciprocal of 5: __
â 1 = ___
To solve __
â 5, first
8 5
40
8
5.
rewrite 5 as __
Then, multiply the two fractions:
1
5.
1 __
__
â 5 = __
8 1
8
72
UNIT 3 LESSON 13
Review Operations with Fractions
```
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