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 83 − 22 by rounding each number to the nearest 10.
Answer: 60
- 83 rounds to 80; 22 rounds to 20
- 80 − 20 = 60
The exact answer is 61, close to the estimate.
2.Estimate 59 + 47 by rounding each number to the nearest 10.
Answer: 110
- 59 rounds to 60; 47 rounds to 50
- 60 + 50 = 110
The exact answer is 106, close to the estimate.
3.Estimate 83 − 28 by rounding each number to the nearest 10.
Answer: 50
- 83 rounds to 80; 28 rounds to 30
- 80 − 30 = 50
The exact answer is 55, close to the estimate.
4.Estimate 52 + 38 by rounding each number to the nearest 10.
Answer: 90
- 52 rounds to 50; 38 rounds to 40
- 50 + 40 = 90
The exact answer is 90, close to the estimate.
5.Estimate 46 + 58 by rounding each number to the nearest 10.
Answer: 110
- 46 rounds to 50; 58 rounds to 60
- 50 + 60 = 110
The exact answer is 104, close to the estimate.
6.Estimate 46 + 62 by rounding each number to the nearest 10.
Answer: 110
- 46 rounds to 50; 62 rounds to 60
- 50 + 60 = 110
The exact answer is 108, close to the estimate.
7.Estimate 71 − 31 by rounding each number to the nearest 10.
Answer: 40
- 71 rounds to 70; 31 rounds to 30
- 70 − 30 = 40
The exact answer is 40, close to the estimate.
8.Estimate 65 − 11 by rounding each number to the nearest 10.
Answer: 60
- 65 rounds to 70; 11 rounds to 10
- 70 − 10 = 60
The exact answer is 54, close to the estimate.
9.Estimate 55 + 33 by rounding each number to the nearest 10.
Answer: 90
- 55 rounds to 60; 33 rounds to 30
- 60 + 30 = 90
The exact answer is 88, close to the estimate.
10.Estimate 59 − 54 by rounding each number to the nearest 10.
Answer: 10
- 59 rounds to 60; 54 rounds to 50
- 60 − 50 = 10
The exact answer is 5, 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.