Practice
Name
5-5
Using Rounding to Estimate
Estimate each product. Sample answers given for 1–12.
2. 7 × 47
1. 38 × 2
350
80
3. 54 × 6
4. 121 × 2 300
200
5. 578 × 8 4,800
6. 823 × 3 2,400
7. 7 × 289 2,100
8. 183 × 4 800
9. 2 × 87
10. 673 × 8 5,600
180
The distance between Bill’s house and his aunt’s house
is 835 miles.
11. About how many miles would
12. About how many miles would
he drive if he made 4 one-way he drive if he made 9 one-way trips?
trips?
About
3,200 miles
About 7,200 miles
13. Vera has 8 boxes of paper clips. Each box contains
275 paper clips. About how many paper clips does Vera have?
A 240
B 1,600
C 2,400
D 24,000
14. Writing to Explain A large 7-story office building has
116 windows on each floor. About how many windows does
the building have in all? Explain.
About 700 windows; 116 rounds to 100
and 7 3 100 5 700.
P 5•5
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