Year 6 Estimating Sums, Differences and Products Worksheet — Level 2 — 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 2 — Practice Set 4 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 216 − 105 by rounding each number to the nearest 100.
Answer: 100
- 216 rounds to 200; 105 rounds to 100
- 200 − 100 = 100
The exact answer is 111, close to the estimate.
2.Estimate 98 × 8 by rounding 98 to the nearest 10.
Answer: 800
- 98 rounds to 100
- 100 × 8 = 800
The exact answer is 784.
3.Estimate 728 − 265 by rounding each number to the nearest 100.
Answer: 400
- 728 rounds to 700; 265 rounds to 300
- 700 − 300 = 400
The exact answer is 463, close to the estimate.
4.Estimate 16 × 8 by rounding 16 to the nearest 10.
Answer: 160
- 16 rounds to 20
- 20 × 8 = 160
The exact answer is 128.
5.Estimate 481 + 825 by rounding each number to the nearest 100.
Answer: 1,300
- 481 rounds to 500; 825 rounds to 800
- 500 + 800 = 1,300
The exact answer is 1,306, close to the estimate.
6.Estimate 49 × 5 by rounding 49 to the nearest 10.
Answer: 250
- 49 rounds to 50
- 50 × 5 = 250
The exact answer is 245.
7.Estimate 657 − 407 by rounding each number to the nearest 100.
Answer: 300
- 657 rounds to 700; 407 rounds to 400
- 700 − 400 = 300
The exact answer is 250, close to the estimate.
8.Estimate 15 × 3 by rounding 15 to the nearest 10.
Answer: 60
- 15 rounds to 20
- 20 × 3 = 60
The exact answer is 45.
9.Estimate 829 − 564 by rounding each number to the nearest 100.
Answer: 200
- 829 rounds to 800; 564 rounds to 600
- 800 − 600 = 200
The exact answer is 265, close to the estimate.
10.Estimate 53 × 8 by rounding 53 to the nearest 10.
Answer: 400
- 53 rounds to 50
- 50 × 8 = 400
The exact answer is 424.
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.