Year 5 Estimating Sums, Differences and Products Worksheet — Level 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 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 590 + 352 by rounding each number to the nearest 100.
Answer: 1,000
- 590 rounds to 600; 352 rounds to 400
- 600 + 400 = 1,000
The exact answer is 942, close to the estimate.
2.Estimate 87 × 8 by rounding 87 to the nearest 10.
Answer: 720
- 87 rounds to 90
- 90 × 8 = 720
The exact answer is 696.
3.Estimate 274 + 476 by rounding each number to the nearest 100.
Answer: 800
- 274 rounds to 300; 476 rounds to 500
- 300 + 500 = 800
The exact answer is 750, close to the estimate.
4.Estimate 16 × 9 by rounding 16 to the nearest 10.
Answer: 180
- 16 rounds to 20
- 20 × 9 = 180
The exact answer is 144.
5.Estimate 935 − 388 by rounding each number to the nearest 100.
Answer: 500
- 935 rounds to 900; 388 rounds to 400
- 900 − 400 = 500
The exact answer is 547, close to the estimate.
6.Estimate 38 × 3 by rounding 38 to the nearest 10.
Answer: 120
- 38 rounds to 40
- 40 × 3 = 120
The exact answer is 114.
7.Estimate 727 − 231 by rounding each number to the nearest 100.
Answer: 500
- 727 rounds to 700; 231 rounds to 200
- 700 − 200 = 500
The exact answer is 496, close to the estimate.
8.Estimate 58 × 6 by rounding 58 to the nearest 10.
Answer: 360
- 58 rounds to 60
- 60 × 6 = 360
The exact answer is 348.
9.Estimate 413 + 891 by rounding each number to the nearest 100.
Answer: 1,300
- 413 rounds to 400; 891 rounds to 900
- 400 + 900 = 1,300
The exact answer is 1,304, close to the estimate.
10.Estimate 39 × 5 by rounding 39 to the nearest 10.
Answer: 200
- 39 rounds to 40
- 40 × 5 = 200
The exact answer is 195.
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.