Year 6 Estimating Sums, Differences and Products Worksheet — Level 2 — 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 2 — Practice Set 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 264 − 135 by rounding each number to the nearest 100.
Answer: 200
- 264 rounds to 300; 135 rounds to 100
- 300 − 100 = 200
The exact answer is 129, close to the estimate.
2.Estimate 66 × 4 by rounding 66 to the nearest 10.
Answer: 280
- 66 rounds to 70
- 70 × 4 = 280
The exact answer is 264.
3.Estimate 154 + 387 by rounding each number to the nearest 100.
Answer: 600
- 154 rounds to 200; 387 rounds to 400
- 200 + 400 = 600
The exact answer is 541, close to the estimate.
4.Estimate 51 × 3 by rounding 51 to the nearest 10.
Answer: 150
- 51 rounds to 50
- 50 × 3 = 150
The exact answer is 153.
5.Estimate 207 + 636 by rounding each number to the nearest 100.
Answer: 800
- 207 rounds to 200; 636 rounds to 600
- 200 + 600 = 800
The exact answer is 843, close to the estimate.
6.Estimate 71 × 6 by rounding 71 to the nearest 10.
Answer: 420
- 71 rounds to 70
- 70 × 6 = 420
The exact answer is 426.
7.Estimate 384 + 216 by rounding each number to the nearest 100.
Answer: 600
- 384 rounds to 400; 216 rounds to 200
- 400 + 200 = 600
The exact answer is 600, close to the estimate.
8.Estimate 32 × 6 by rounding 32 to the nearest 10.
Answer: 180
- 32 rounds to 30
- 30 × 6 = 180
The exact answer is 192.
9.Estimate 957 − 195 by rounding each number to the nearest 100.
Answer: 800
- 957 rounds to 1,000; 195 rounds to 200
- 1,000 − 200 = 800
The exact answer is 762, close to the estimate.
10.Estimate 11 × 3 by rounding 11 to the nearest 10.
Answer: 30
- 11 rounds to 10
- 10 × 3 = 30
The exact answer is 33.
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.