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 698 − 415 by rounding each number to the nearest 100.
Answer: 300
- 698 rounds to 700; 415 rounds to 400
- 700 − 400 = 300
The exact answer is 283, close to the estimate.
2.Estimate 17 × 9 by rounding 17 to the nearest 10.
Answer: 180
- 17 rounds to 20
- 20 × 9 = 180
The exact answer is 153.
3.Estimate 246 + 263 by rounding each number to the nearest 100.
Answer: 500
- 246 rounds to 200; 263 rounds to 300
- 200 + 300 = 500
The exact answer is 509, close to the estimate.
4.Estimate 14 × 4 by rounding 14 to the nearest 10.
Answer: 40
- 14 rounds to 10
- 10 × 4 = 40
The exact answer is 56.
5.Estimate 828 + 722 by rounding each number to the nearest 100.
Answer: 1,500
- 828 rounds to 800; 722 rounds to 700
- 800 + 700 = 1,500
The exact answer is 1,550, close to the estimate.
6.Estimate 61 × 6 by rounding 61 to the nearest 10.
Answer: 360
- 61 rounds to 60
- 60 × 6 = 360
The exact answer is 366.
7.Estimate 827 − 333 by rounding each number to the nearest 100.
Answer: 500
- 827 rounds to 800; 333 rounds to 300
- 800 − 300 = 500
The exact answer is 494, close to the estimate.
8.Estimate 45 × 5 by rounding 45 to the nearest 10.
Answer: 250
- 45 rounds to 50
- 50 × 5 = 250
The exact answer is 225.
9.Estimate 932 + 150 by rounding each number to the nearest 100.
Answer: 1,100
- 932 rounds to 900; 150 rounds to 200
- 900 + 200 = 1,100
The exact answer is 1,082, close to the estimate.
10.Estimate 69 × 8 by rounding 69 to the nearest 10.
Answer: 560
- 69 rounds to 70
- 70 × 8 = 560
The exact answer is 552.
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.