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 568 + 543 by rounding each number to the nearest 100.
Answer: 1,100
- 568 rounds to 600; 543 rounds to 500
- 600 + 500 = 1,100
The exact answer is 1,111, close to the estimate.
2.Estimate 34 × 6 by rounding 34 to the nearest 10.
Answer: 180
- 34 rounds to 30
- 30 × 6 = 180
The exact answer is 204.
3.Estimate 915 + 868 by rounding each number to the nearest 100.
Answer: 1,800
- 915 rounds to 900; 868 rounds to 900
- 900 + 900 = 1,800
The exact answer is 1,783, close to the estimate.
4.Estimate 76 × 3 by rounding 76 to the nearest 10.
Answer: 240
- 76 rounds to 80
- 80 × 3 = 240
The exact answer is 228.
5.Estimate 441 + 109 by rounding each number to the nearest 100.
Answer: 500
- 441 rounds to 400; 109 rounds to 100
- 400 + 100 = 500
The exact answer is 550, close to the estimate.
6.Estimate 98 × 5 by rounding 98 to the nearest 10.
Answer: 500
- 98 rounds to 100
- 100 × 5 = 500
The exact answer is 490.
7.Estimate 762 − 252 by rounding each number to the nearest 100.
Answer: 500
- 762 rounds to 800; 252 rounds to 300
- 800 − 300 = 500
The exact answer is 510, close to the estimate.
8.Estimate 45 × 7 by rounding 45 to the nearest 10.
Answer: 350
- 45 rounds to 50
- 50 × 7 = 350
The exact answer is 315.
9.Estimate 202 + 204 by rounding each number to the nearest 100.
Answer: 400
- 202 rounds to 200; 204 rounds to 200
- 200 + 200 = 400
The exact answer is 406, close to the estimate.
10.Estimate 77 × 9 by rounding 77 to the nearest 10.
Answer: 720
- 77 rounds to 80
- 80 × 9 = 720
The exact answer is 693.
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.