Year 5 Estimating Sums, Differences and Products Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 5 place value worksheet.
Success TutoringWorksheetsAnswer sheetYear 5 · Mathematics · Place ValueYear 5 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 681 + 802 by rounding each number to the nearest 100.
Answer: 1,500
- 681 rounds to 700; 802 rounds to 800
- 700 + 800 = 1,500
The exact answer is 1,483, close to the estimate.
2.Estimate 86 × 7 by rounding 86 to the nearest 10.
Answer: 630
- 86 rounds to 90
- 90 × 7 = 630
The exact answer is 602.
3.Estimate 917 + 828 by rounding each number to the nearest 100.
Answer: 1,700
- 917 rounds to 900; 828 rounds to 800
- 900 + 800 = 1,700
The exact answer is 1,745, close to the estimate.
4.Estimate 52 × 6 by rounding 52 to the nearest 10.
Answer: 300
- 52 rounds to 50
- 50 × 6 = 300
The exact answer is 312.
5.Estimate 999 − 494 by rounding each number to the nearest 100.
Answer: 500
- 999 rounds to 1,000; 494 rounds to 500
- 1,000 − 500 = 500
The exact answer is 505, close to the estimate.
6.Estimate 65 × 7 by rounding 65 to the nearest 10.
Answer: 490
- 65 rounds to 70
- 70 × 7 = 490
The exact answer is 455.
7.Estimate 302 + 647 by rounding each number to the nearest 100.
Answer: 900
- 302 rounds to 300; 647 rounds to 600
- 300 + 600 = 900
The exact answer is 949, close to the estimate.
8.Estimate 72 × 7 by rounding 72 to the nearest 10.
Answer: 490
- 72 rounds to 70
- 70 × 7 = 490
The exact answer is 504.
9.Estimate 854 − 612 by rounding each number to the nearest 100.
Answer: 300
- 854 rounds to 900; 612 rounds to 600
- 900 − 600 = 300
The exact answer is 242, close to the estimate.
10.Estimate 19 × 9 by rounding 19 to the nearest 10.
Answer: 180
- 19 rounds to 20
- 20 × 9 = 180
The exact answer is 171.
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.