Estimation Strategies

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Show your work for each problem.

1.
What is rounded to the nearest ten?
1. a)100
2. b)110
3. c)90
4. d)95
2.
Round to the nearest ten.
3.
Which is the best estimate for ?
1. a)500
2. b)550
3. c)600
4. d)700
4.
Use front-end estimation: What is approximately?
5.
Estimate using rounding.
6.
Use compatible numbers to estimate .
1. a)38
2. b)45
3. c)35
4. d)40
7.
Estimate by rounding 23 to the nearest ten.
8.
You have 30 euros. Items cost 7 euros, 9 euros, and 11 euros. Can you buy all three?
9.
A calculator shows . Using estimation, is this reasonable?
1. a)Cannot determine
2. b)No, it's too high
3. c)No, it's too low
4. d)Yes, it's reasonable
10.
Use compatible numbers: Estimate .
11.
Use front-end estimation with adjustment for .
12.
Which is the best strategy to estimate ?
1. a)Rounding (190 ÷ 6)
2. b)No estimation needed
3. c)Compatible numbers (180 ÷ 6 = 30)
4. d)Front-end (100 ÷ 6)
13.
Estimate by rounding.
14.
Your car travels 28 miles per gallon. Gas costs 4 dollars per gallon. Estimate the gas cost for a 350-mile trip.
15.
Why might you want to overestimate when budgeting money?
1. a)To get an exact answer
2. b)To make math easier
3. c)To avoid running out of money
4. d)Overestimating is always wrong
16.
Round to the nearest ten.
17.
Estimate by rounding each number to the nearest ten.
18.
Use compatible numbers to estimate .