Year 6 Estimating Sums, Differences and Products Worksheet — Level 1 — Practice Set 4 — 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 4 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 69 − 35 by rounding each number to the nearest 10.
Answer: 30
- 69 rounds to 70; 35 rounds to 40
- 70 − 40 = 30
The exact answer is 34, close to the estimate.
2.Estimate 19 + 44 by rounding each number to the nearest 10.
Answer: 60
- 19 rounds to 20; 44 rounds to 40
- 20 + 40 = 60
The exact answer is 63, close to the estimate.
3.Estimate 58 + 84 by rounding each number to the nearest 10.
Answer: 140
- 58 rounds to 60; 84 rounds to 80
- 60 + 80 = 140
The exact answer is 142, close to the estimate.
4.Estimate 86 − 55 by rounding each number to the nearest 10.
Answer: 30
- 86 rounds to 90; 55 rounds to 60
- 90 − 60 = 30
The exact answer is 31, close to the estimate.
5.Estimate 99 + 22 by rounding each number to the nearest 10.
Answer: 120
- 99 rounds to 100; 22 rounds to 20
- 100 + 20 = 120
The exact answer is 121, close to the estimate.
6.Estimate 22 + 67 by rounding each number to the nearest 10.
Answer: 90
- 22 rounds to 20; 67 rounds to 70
- 20 + 70 = 90
The exact answer is 89, close to the estimate.
7.Estimate 99 − 78 by rounding each number to the nearest 10.
Answer: 20
- 99 rounds to 100; 78 rounds to 80
- 100 − 80 = 20
The exact answer is 21, close to the estimate.
8.Estimate 34 + 28 by rounding each number to the nearest 10.
Answer: 60
- 34 rounds to 30; 28 rounds to 30
- 30 + 30 = 60
The exact answer is 62, close to the estimate.
9.Estimate 53 + 88 by rounding each number to the nearest 10.
Answer: 140
- 53 rounds to 50; 88 rounds to 90
- 50 + 90 = 140
The exact answer is 141, close to the estimate.
10.Estimate 86 − 23 by rounding each number to the nearest 10.
Answer: 70
- 86 rounds to 90; 23 rounds to 20
- 90 − 20 = 70
The exact answer is 63, 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.