Estimating Differences Worksheet
Practice estimating differences between numbers by rounding to the nearest ten or hundred.
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Estimating Differences
Name:
Date:
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Read each question carefully and follow the instructions to estimate the differences. Remember to round to the nearest ten or hundred as specified.
Round each number to the nearest ten, then estimate the difference.
1. 78 - 23 ≈
2. 91 - 47 ≈
3. 54 - 16 ≈
4. 85 - 39 ≈
Use the number line to help you round 67 to the nearest ten. Then, estimate 67 - 21.
Rounded 67:
Estimated difference:
Round each number to the nearest hundred, then estimate the difference.
1. 389 - 112 ≈
2. 521 - 280 ≈
3. 765 - 405 ≈
4. 903 - 678 ≈
1. Which is the best estimate for 452 - 198 when rounding to the nearest hundred?
200
300
400
500
2. Estimate the difference between 805 and 396 by rounding to the nearest ten.
400
410
420
430
Solve the following word problems by estimating the differences.
1. A library has 587 fiction books and 312 non-fiction books. About how many more fiction books are there than non-fiction books? (Round to the nearest hundred)
2. Sarah saved $245 and John saved $128. About how much more money did Sarah save than John? (Round to the nearest ten)
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