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 89 − 38 by rounding each number to the nearest 10.
Answer: 50
- 89 rounds to 90; 38 rounds to 40
- 90 − 40 = 50
The exact answer is 51, close to the estimate.
2.Estimate 61 + 99 by rounding each number to the nearest 10.
Answer: 160
- 61 rounds to 60; 99 rounds to 100
- 60 + 100 = 160
The exact answer is 160, close to the estimate.
3.Estimate 96 − 68 by rounding each number to the nearest 10.
Answer: 30
- 96 rounds to 100; 68 rounds to 70
- 100 − 70 = 30
The exact answer is 28, close to the estimate.
4.Estimate 44 + 48 by rounding each number to the nearest 10.
Answer: 90
- 44 rounds to 40; 48 rounds to 50
- 40 + 50 = 90
The exact answer is 92, close to the estimate.
5.Estimate 87 + 65 by rounding each number to the nearest 10.
Answer: 160
- 87 rounds to 90; 65 rounds to 70
- 90 + 70 = 160
The exact answer is 152, close to the estimate.
6.Estimate 76 + 76 by rounding each number to the nearest 10.
Answer: 160
- 76 rounds to 80; 76 rounds to 80
- 80 + 80 = 160
The exact answer is 152, close to the estimate.
7.Estimate 51 − 43 by rounding each number to the nearest 10.
Answer: 10
- 51 rounds to 50; 43 rounds to 40
- 50 − 40 = 10
The exact answer is 8, close to the estimate.
8.Estimate 49 + 74 by rounding each number to the nearest 10.
Answer: 120
- 49 rounds to 50; 74 rounds to 70
- 50 + 70 = 120
The exact answer is 123, close to the estimate.
9.Estimate 27 − 17 by rounding each number to the nearest 10.
Answer: 10
- 27 rounds to 30; 17 rounds to 20
- 30 − 20 = 10
The exact answer is 10, close to the estimate.
10.Estimate 89 − 58 by rounding each number to the nearest 10.
Answer: 30
- 89 rounds to 90; 58 rounds to 60
- 90 − 60 = 30
The exact answer is 31, 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.