Year 6 Estimating Sums, Differences and Products Worksheet — Level 1 — Practice Set 2 — 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 2 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 76 − 74 by rounding each number to the nearest 10.
Answer: 10
- 76 rounds to 80; 74 rounds to 70
- 80 − 70 = 10
The exact answer is 2, close to the estimate.
2.Estimate 24 − 12 by rounding each number to the nearest 10.
Answer: 10
- 24 rounds to 20; 12 rounds to 10
- 20 − 10 = 10
The exact answer is 12, close to the estimate.
3.Estimate 81 − 39 by rounding each number to the nearest 10.
Answer: 40
- 81 rounds to 80; 39 rounds to 40
- 80 − 40 = 40
The exact answer is 42, close to the estimate.
4.Estimate 71 + 13 by rounding each number to the nearest 10.
Answer: 80
- 71 rounds to 70; 13 rounds to 10
- 70 + 10 = 80
The exact answer is 84, close to the estimate.
5.Estimate 99 + 37 by rounding each number to the nearest 10.
Answer: 140
- 99 rounds to 100; 37 rounds to 40
- 100 + 40 = 140
The exact answer is 136, close to the estimate.
6.Estimate 92 − 55 by rounding each number to the nearest 10.
Answer: 30
- 92 rounds to 90; 55 rounds to 60
- 90 − 60 = 30
The exact answer is 37, close to the estimate.
7.Estimate 48 − 42 by rounding each number to the nearest 10.
Answer: 10
- 48 rounds to 50; 42 rounds to 40
- 50 − 40 = 10
The exact answer is 6, close to the estimate.
8.Estimate 46 + 51 by rounding each number to the nearest 10.
Answer: 100
- 46 rounds to 50; 51 rounds to 50
- 50 + 50 = 100
The exact answer is 97, close to the estimate.
9.Estimate 76 − 64 by rounding each number to the nearest 10.
Answer: 20
- 76 rounds to 80; 64 rounds to 60
- 80 − 60 = 20
The exact answer is 12, close to the estimate.
10.Estimate 54 + 68 by rounding each number to the nearest 10.
Answer: 120
- 54 rounds to 50; 68 rounds to 70
- 50 + 70 = 120
The exact answer is 122, 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.