6th Grade Estimating Sums, Differences and Products Worksheet — Level 1 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 6th Grade place value worksheet.
Success TutoringWorksheetsAnswer sheet6th Grade · Mathematics · Place Value6th 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 86 − 75 by rounding each number to the nearest 10.
Answer: 10
- 86 rounds to 90; 75 rounds to 80
- 90 − 80 = 10
The exact answer is 11, close to the estimate.
2.Estimate 34 − 13 by rounding each number to the nearest 10.
Answer: 20
- 34 rounds to 30; 13 rounds to 10
- 30 − 10 = 20
The exact answer is 21, close to the estimate.
3.Estimate 51 − 37 by rounding each number to the nearest 10.
Answer: 10
- 51 rounds to 50; 37 rounds to 40
- 50 − 40 = 10
The exact answer is 14, close to the estimate.
4.Estimate 88 − 18 by rounding each number to the nearest 10.
Answer: 70
- 88 rounds to 90; 18 rounds to 20
- 90 − 20 = 70
The exact answer is 70, close to the estimate.
5.Estimate 77 + 56 by rounding each number to the nearest 10.
Answer: 140
- 77 rounds to 80; 56 rounds to 60
- 80 + 60 = 140
The exact answer is 133, close to the estimate.
6.Estimate 99 − 23 by rounding each number to the nearest 10.
Answer: 80
- 99 rounds to 100; 23 rounds to 20
- 100 − 20 = 80
The exact answer is 76, close to the estimate.
7.Estimate 72 − 49 by rounding each number to the nearest 10.
Answer: 20
- 72 rounds to 70; 49 rounds to 50
- 70 − 50 = 20
The exact answer is 23, close to the estimate.
8.Estimate 87 − 52 by rounding each number to the nearest 10.
Answer: 40
- 87 rounds to 90; 52 rounds to 50
- 90 − 50 = 40
The exact answer is 35, close to the estimate.
9.Estimate 84 + 72 by rounding each number to the nearest 10.
Answer: 150
- 84 rounds to 80; 72 rounds to 70
- 80 + 70 = 150
The exact answer is 156, close to the estimate.
10.Estimate 43 + 53 by rounding each number to the nearest 10.
Answer: 90
- 43 rounds to 40; 53 rounds to 50
- 40 + 50 = 90
The exact answer is 96, 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.