Year 4 Estimating Sums, Differences and Products Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 4 place value worksheet.
Success TutoringWorksheetsAnswer sheetYear 4 · Mathematics · Place ValueYear 4 Estimating Sums, Differences and Products Worksheet — Level 2 — Practice Set 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 963 − 762 by rounding each number to the nearest 100.
Answer: 200
- 963 rounds to 1,000; 762 rounds to 800
- 1,000 − 800 = 200
The exact answer is 201, close to the estimate.
2.Estimate 59 × 4 by rounding 59 to the nearest 10.
Answer: 240
- 59 rounds to 60
- 60 × 4 = 240
The exact answer is 236.
3.Estimate 856 − 323 by rounding each number to the nearest 100.
Answer: 600
- 856 rounds to 900; 323 rounds to 300
- 900 − 300 = 600
The exact answer is 533, close to the estimate.
4.Estimate 35 × 6 by rounding 35 to the nearest 10.
Answer: 240
- 35 rounds to 40
- 40 × 6 = 240
The exact answer is 210.
5.Estimate 710 + 661 by rounding each number to the nearest 100.
Answer: 1,400
- 710 rounds to 700; 661 rounds to 700
- 700 + 700 = 1,400
The exact answer is 1,371, close to the estimate.
6.Estimate 37 × 8 by rounding 37 to the nearest 10.
Answer: 320
- 37 rounds to 40
- 40 × 8 = 320
The exact answer is 296.
7.Estimate 340 + 815 by rounding each number to the nearest 100.
Answer: 1,100
- 340 rounds to 300; 815 rounds to 800
- 300 + 800 = 1,100
The exact answer is 1,155, close to the estimate.
8.Estimate 59 × 9 by rounding 59 to the nearest 10.
Answer: 540
- 59 rounds to 60
- 60 × 9 = 540
The exact answer is 531.
9.Estimate 843 − 381 by rounding each number to the nearest 100.
Answer: 400
- 843 rounds to 800; 381 rounds to 400
- 800 − 400 = 400
The exact answer is 462, close to the estimate.
10.Estimate 17 × 6 by rounding 17 to the nearest 10.
Answer: 120
- 17 rounds to 20
- 20 × 6 = 120
The exact answer is 102.
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.