Estimating and Checking Addition Answers
Name: _______________________________
Date: _______________________________
Instructions:
For each problem, first estimate the answer by rounding the numbers. Then calculate the actual answer. Finally, check if your estimate was reasonable.
Part A: Round to the nearest 10
1.
47 + 82
Estimate: _________ + _________ = _________
Actual answer: _________
Is your estimate reasonable? _________
2.
134 + 68
Estimate: _________ + _________ = _________
Actual answer: _________
Is your estimate reasonable? _________
3.
256 + 183
Estimate: _________ + _________ = _________
Actual answer: _________
Is your estimate reasonable? _________
Part B: Round to the nearest 100
4.
347 + 482
Estimate: _________ + _________ = _________
Actual answer: _________
Is your estimate reasonable? _________
5.
1,267 + 854
Estimate: _________ + _________ = _________
Actual answer: _________
Is your estimate reasonable? _________
6.
2,438 + 1,691
Estimate: _________ + _________ = _________
Actual answer: _________
Is your estimate reasonable? _________
Part C: Challenge - You choose!
Decide whether to round to the nearest 10 or 100 for each problem.
7.
3,456 + 2,178
Estimate: _________ + _________ = _________
Actual answer: _________
8.
567 + 89 + 342
Estimate: _________ + _________ + _________ = _________
Actual answer: _________