NAME _____________________________________________ DATE __________________ PERIOD _________
Lesson 1 Homework Practice
Estimate Products of Fractions
Estimate each product.
1
1. −
× 28
1
2. −
× 20
3
1
−
× 27 = 9
1
−
of 81 = 9
7
9
5
5. −
× 23
1
of 47
4. −−
11
2
6. −
× 76
8
3
5
−
× 24 = 15
1
−−
of 44 = 4
11
2
−
× 75 = 50
8
3
6
8. −
of 51
2
of 37
7. −
5
3
2
9. −
×−
7
5
6
−
of 49 = 42
2
−
of 35 = 14
5
2
10
7
11. −−
×−
5
19
2
6
1
× 3−
13. 2 −
7
3
3
12. −
×−
8
4
1
1
−
×1=−
1×1=1
10
2
2
3
2
15. 4 −
× 17 −
4
8
13 × 6 = 78
3×3=9
7
1
1
1×−
=−
2
9
1
14. 12 −−
× 6−
4
9
1
−
×0=0
7
7
4
×−
10. −
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9
1
−
× 21 = 3
3
8
1
3. −
of 83
7
7
4 × 17 = 68
Estimate the area of each rectangle.
16.
17.
1
2 3 ft
15
4 16 in.
5
6 8 ft
1
5 8 in.
5 × 5 = 25 in2
7 × 2 = 14 ft2
18. SCULPTURE Trevor is using the recipe for
sculpture-carving material shown at the right.
a. About how many cups of cement would he need to
4
batch of the recipe?
make −
9
1
1
Sample answer: −
×1=−
cup cement
2
2
Girostone Recipe
5 cup vermiculite
1
1−
cup cement
4
5
−
cup sand
8
water to form thick paste
b. About how many cups of sand would he need to make
6
1−
batches of the recipe?
7
1
Sample answer: 2 × −
= 1 cup sand
2
Course 1 • Chapter 4 Multiply and Divide Fractions
53