5th Grade Estimating Sums, Differences and Products Worksheet — Level 1 — Practice Set 2 — 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 — Practice Set 2 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 88 − 64 by rounding each number to the nearest 10.
Answer: 30
- 88 rounds to 90; 64 rounds to 60
- 90 − 60 = 30
The exact answer is 24, close to the estimate.
2.Estimate 76 + 53 by rounding each number to the nearest 10.
Answer: 130
- 76 rounds to 80; 53 rounds to 50
- 80 + 50 = 130
The exact answer is 129, close to the estimate.
3.Estimate 66 − 41 by rounding each number to the nearest 10.
Answer: 30
- 66 rounds to 70; 41 rounds to 40
- 70 − 40 = 30
The exact answer is 25, close to the estimate.
4.Estimate 92 + 22 by rounding each number to the nearest 10.
Answer: 110
- 92 rounds to 90; 22 rounds to 20
- 90 + 20 = 110
The exact answer is 114, close to the estimate.
5.Estimate 16 + 63 by rounding each number to the nearest 10.
Answer: 80
- 16 rounds to 20; 63 rounds to 60
- 20 + 60 = 80
The exact answer is 79, close to the estimate.
6.Estimate 22 + 11 by rounding each number to the nearest 10.
Answer: 30
- 22 rounds to 20; 11 rounds to 10
- 20 + 10 = 30
The exact answer is 33, close to the estimate.
7.Estimate 35 + 33 by rounding each number to the nearest 10.
Answer: 70
- 35 rounds to 40; 33 rounds to 30
- 40 + 30 = 70
The exact answer is 68, close to the estimate.
8.Estimate 26 + 55 by rounding each number to the nearest 10.
Answer: 90
- 26 rounds to 30; 55 rounds to 60
- 30 + 60 = 90
The exact answer is 81, close to the estimate.
9.Estimate 71 − 58 by rounding each number to the nearest 10.
Answer: 10
- 71 rounds to 70; 58 rounds to 60
- 70 − 60 = 10
The exact answer is 13, close to the estimate.
10.Estimate 62 − 28 by rounding each number to the nearest 10.
Answer: 30
- 62 rounds to 60; 28 rounds to 30
- 60 − 30 = 30
The exact answer is 34, 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.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.