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 34 + 44 by rounding each number to the nearest 10.
Answer: 70
- 34 rounds to 30; 44 rounds to 40
- 30 + 40 = 70
The exact answer is 78, close to the estimate.
2.Estimate 98 − 18 by rounding each number to the nearest 10.
Answer: 80
- 98 rounds to 100; 18 rounds to 20
- 100 − 20 = 80
The exact answer is 80, close to the estimate.
3.Estimate 91 + 17 by rounding each number to the nearest 10.
Answer: 110
- 91 rounds to 90; 17 rounds to 20
- 90 + 20 = 110
The exact answer is 108, close to the estimate.
4.Estimate 49 − 22 by rounding each number to the nearest 10.
Answer: 30
- 49 rounds to 50; 22 rounds to 20
- 50 − 20 = 30
The exact answer is 27, close to the estimate.
5.Estimate 99 − 16 by rounding each number to the nearest 10.
Answer: 80
- 99 rounds to 100; 16 rounds to 20
- 100 − 20 = 80
The exact answer is 83, close to the estimate.
6.Estimate 76 − 57 by rounding each number to the nearest 10.
Answer: 20
- 76 rounds to 80; 57 rounds to 60
- 80 − 60 = 20
The exact answer is 19, close to the estimate.
7.Estimate 84 − 34 by rounding each number to the nearest 10.
Answer: 50
- 84 rounds to 80; 34 rounds to 30
- 80 − 30 = 50
The exact answer is 50, close to the estimate.
8.Estimate 61 − 28 by rounding each number to the nearest 10.
Answer: 30
- 61 rounds to 60; 28 rounds to 30
- 60 − 30 = 30
The exact answer is 33, close to the estimate.
9.Estimate 97 − 82 by rounding each number to the nearest 10.
Answer: 20
- 97 rounds to 100; 82 rounds to 80
- 100 − 80 = 20
The exact answer is 15, close to the estimate.
10.Estimate 81 + 47 by rounding each number to the nearest 10.
Answer: 130
- 81 rounds to 80; 47 rounds to 50
- 80 + 50 = 130
The exact answer is 128, 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.