Year 5 Estimating Sums, Differences and Products Worksheet — Level 2 — Practice Set 4 — 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 4 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 332 + 392 by rounding each number to the nearest 100.
Answer: 700
- 332 rounds to 300; 392 rounds to 400
- 300 + 400 = 700
The exact answer is 724, close to the estimate.
2.Estimate 11 × 8 by rounding 11 to the nearest 10.
Answer: 80
- 11 rounds to 10
- 10 × 8 = 80
The exact answer is 88.
3.Estimate 878 + 447 by rounding each number to the nearest 100.
Answer: 1,300
- 878 rounds to 900; 447 rounds to 400
- 900 + 400 = 1,300
The exact answer is 1,325, 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 172 + 688 by rounding each number to the nearest 100.
Answer: 900
- 172 rounds to 200; 688 rounds to 700
- 200 + 700 = 900
The exact answer is 860, close to the estimate.
6.Estimate 72 × 9 by rounding 72 to the nearest 10.
Answer: 630
- 72 rounds to 70
- 70 × 9 = 630
The exact answer is 648.
7.Estimate 871 + 493 by rounding each number to the nearest 100.
Answer: 1,400
- 871 rounds to 900; 493 rounds to 500
- 900 + 500 = 1,400
The exact answer is 1,364, close to the estimate.
8.Estimate 96 × 9 by rounding 96 to the nearest 10.
Answer: 900
- 96 rounds to 100
- 100 × 9 = 900
The exact answer is 864.
9.Estimate 107 + 293 by rounding each number to the nearest 100.
Answer: 400
- 107 rounds to 100; 293 rounds to 300
- 100 + 300 = 400
The exact answer is 400, close to the estimate.
10.Estimate 37 × 4 by rounding 37 to the nearest 10.
Answer: 160
- 37 rounds to 40
- 40 × 4 = 160
The exact answer is 148.
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.