Year 6 Estimating Sums, Differences and Products Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 6 place value worksheet.
Success TutoringWorksheetsAnswer sheetYear 6 · Mathematics · Place ValueYear 6 Estimating Sums, Differences and Products Worksheet — Level 1 — Practice Set 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 88 − 32 by rounding each number to the nearest 10.
Answer: 60
- 88 rounds to 90; 32 rounds to 30
- 90 − 30 = 60
The exact answer is 56, close to the estimate.
2.Estimate 83 − 68 by rounding each number to the nearest 10.
Answer: 10
- 83 rounds to 80; 68 rounds to 70
- 80 − 70 = 10
The exact answer is 15, close to the estimate.
3.Estimate 73 − 31 by rounding each number to the nearest 10.
Answer: 40
- 73 rounds to 70; 31 rounds to 30
- 70 − 30 = 40
The exact answer is 42, close to the estimate.
4.Estimate 21 + 86 by rounding each number to the nearest 10.
Answer: 110
- 21 rounds to 20; 86 rounds to 90
- 20 + 90 = 110
The exact answer is 107, close to the estimate.
5.Estimate 84 − 74 by rounding each number to the nearest 10.
Answer: 10
- 84 rounds to 80; 74 rounds to 70
- 80 − 70 = 10
The exact answer is 10, close to the estimate.
6.Estimate 98 − 71 by rounding each number to the nearest 10.
Answer: 30
- 98 rounds to 100; 71 rounds to 70
- 100 − 70 = 30
The exact answer is 27, close to the estimate.
7.Estimate 86 − 22 by rounding each number to the nearest 10.
Answer: 70
- 86 rounds to 90; 22 rounds to 20
- 90 − 20 = 70
The exact answer is 64, close to the estimate.
8.Estimate 95 − 72 by rounding each number to the nearest 10.
Answer: 30
- 95 rounds to 100; 72 rounds to 70
- 100 − 70 = 30
The exact answer is 23, close to the estimate.
9.Estimate 35 + 92 by rounding each number to the nearest 10.
Answer: 130
- 35 rounds to 40; 92 rounds to 90
- 40 + 90 = 130
The exact answer is 127, close to the estimate.
10.Estimate 78 − 37 by rounding each number to the nearest 10.
Answer: 40
- 78 rounds to 80; 37 rounds to 40
- 80 − 40 = 40
The exact answer is 41, 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.