5th Grade Estimating Sums, Differences and Products Worksheet — Level 1 — Answers
Answer sheet with worked solutions for the 5th Grade place value worksheet.
Success TutoringWorksheetsAnswer sheet5th Grade · Mathematics · Place Value5th Grade Estimating Sums, Differences and Products Worksheet — Level 1 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 84 − 65 by rounding each number to the nearest 10.
Answer: 10
- 84 rounds to 80; 65 rounds to 70
- 80 − 70 = 10
The exact answer is 19, close to the estimate.
2.Estimate 62 − 25 by rounding each number to the nearest 10.
Answer: 30
- 62 rounds to 60; 25 rounds to 30
- 60 − 30 = 30
The exact answer is 37, close to the estimate.
3.Estimate 73 − 62 by rounding each number to the nearest 10.
Answer: 10
- 73 rounds to 70; 62 rounds to 60
- 70 − 60 = 10
The exact answer is 11, close to the estimate.
4.Estimate 75 − 74 by rounding each number to the nearest 10.
Answer: 10
- 75 rounds to 80; 74 rounds to 70
- 80 − 70 = 10
The exact answer is 1, close to the estimate.
5.Estimate 37 + 26 by rounding each number to the nearest 10.
Answer: 70
- 37 rounds to 40; 26 rounds to 30
- 40 + 30 = 70
The exact answer is 63, close to the estimate.
6.Estimate 28 + 98 by rounding each number to the nearest 10.
Answer: 130
- 28 rounds to 30; 98 rounds to 100
- 30 + 100 = 130
The exact answer is 126, close to the estimate.
7.Estimate 39 + 38 by rounding each number to the nearest 10.
Answer: 80
- 39 rounds to 40; 38 rounds to 40
- 40 + 40 = 80
The exact answer is 77, close to the estimate.
8.Estimate 42 + 75 by rounding each number to the nearest 10.
Answer: 120
- 42 rounds to 40; 75 rounds to 80
- 40 + 80 = 120
The exact answer is 117, close to the estimate.
9.Estimate 42 + 84 by rounding each number to the nearest 10.
Answer: 120
- 42 rounds to 40; 84 rounds to 80
- 40 + 80 = 120
The exact answer is 126, close to the estimate.
10.Estimate 65 + 36 by rounding each number to the nearest 10.
Answer: 110
- 65 rounds to 70; 36 rounds to 40
- 70 + 40 = 110
The exact answer is 101, close to the estimate.
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
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