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 74 + 31 by rounding each number to the nearest 10.
Answer: 100
- 74 rounds to 70; 31 rounds to 30
- 70 + 30 = 100
The exact answer is 105, close to the estimate.
2.Estimate 77 − 56 by rounding each number to the nearest 10.
Answer: 20
- 77 rounds to 80; 56 rounds to 60
- 80 − 60 = 20
The exact answer is 21, close to the estimate.
3.Estimate 67 + 13 by rounding each number to the nearest 10.
Answer: 80
- 67 rounds to 70; 13 rounds to 10
- 70 + 10 = 80
The exact answer is 80, close to the estimate.
4.Estimate 89 − 55 by rounding each number to the nearest 10.
Answer: 30
- 89 rounds to 90; 55 rounds to 60
- 90 − 60 = 30
The exact answer is 34, close to the estimate.
5.Estimate 52 + 95 by rounding each number to the nearest 10.
Answer: 150
- 52 rounds to 50; 95 rounds to 100
- 50 + 100 = 150
The exact answer is 147, close to the estimate.
6.Estimate 22 + 64 by rounding each number to the nearest 10.
Answer: 80
- 22 rounds to 20; 64 rounds to 60
- 20 + 60 = 80
The exact answer is 86, close to the estimate.
7.Estimate 83 − 33 by rounding each number to the nearest 10.
Answer: 50
- 83 rounds to 80; 33 rounds to 30
- 80 − 30 = 50
The exact answer is 50, close to the estimate.
8.Estimate 74 + 92 by rounding each number to the nearest 10.
Answer: 160
- 74 rounds to 70; 92 rounds to 90
- 70 + 90 = 160
The exact answer is 166, close to the estimate.
9.Estimate 95 + 31 by rounding each number to the nearest 10.
Answer: 130
- 95 rounds to 100; 31 rounds to 30
- 100 + 30 = 130
The exact answer is 126, close to the estimate.
10.Estimate 78 + 82 by rounding each number to the nearest 10.
Answer: 160
- 78 rounds to 80; 82 rounds to 80
- 80 + 80 = 160
The exact answer is 160, 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.