Year 6 Estimating Sums, Differences and Products Worksheet — Level 2 — 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 2 — Practice Set 2 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 989 + 289 by rounding each number to the nearest 100.
Answer: 1,300
- 989 rounds to 1,000; 289 rounds to 300
- 1,000 + 300 = 1,300
The exact answer is 1,278, close to the estimate.
2.Estimate 63 × 5 by rounding 63 to the nearest 10.
Answer: 300
- 63 rounds to 60
- 60 × 5 = 300
The exact answer is 315.
3.Estimate 987 − 846 by rounding each number to the nearest 100.
Answer: 200
- 987 rounds to 1,000; 846 rounds to 800
- 1,000 − 800 = 200
The exact answer is 141, close to the estimate.
4.Estimate 88 × 5 by rounding 88 to the nearest 10.
Answer: 450
- 88 rounds to 90
- 90 × 5 = 450
The exact answer is 440.
5.Estimate 416 − 242 by rounding each number to the nearest 100.
Answer: 200
- 416 rounds to 400; 242 rounds to 200
- 400 − 200 = 200
The exact answer is 174, close to the estimate.
6.Estimate 83 × 3 by rounding 83 to the nearest 10.
Answer: 240
- 83 rounds to 80
- 80 × 3 = 240
The exact answer is 249.
7.Estimate 298 − 134 by rounding each number to the nearest 100.
Answer: 200
- 298 rounds to 300; 134 rounds to 100
- 300 − 100 = 200
The exact answer is 164, close to the estimate.
8.Estimate 56 × 7 by rounding 56 to the nearest 10.
Answer: 420
- 56 rounds to 60
- 60 × 7 = 420
The exact answer is 392.
9.Estimate 159 + 666 by rounding each number to the nearest 100.
Answer: 900
- 159 rounds to 200; 666 rounds to 700
- 200 + 700 = 900
The exact answer is 825, close to the estimate.
10.Estimate 45 × 6 by rounding 45 to the nearest 10.
Answer: 300
- 45 rounds to 50
- 50 × 6 = 300
The exact answer is 270.
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.