5th Grade Estimating Sums, Differences and Products Worksheet — Level 2 — Answers
Answer sheet with worked solutions for the 5th Grade place value worksheet.
Success TutoringWorksheetsAnswer sheet5th Grade · Mathematics · Place Value5th Grade Estimating Sums, Differences and Products Worksheet — Level 2 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 827 − 367 by rounding each number to the nearest 100.
Answer: 400
- 827 rounds to 800; 367 rounds to 400
- 800 − 400 = 400
The exact answer is 460, close to the estimate.
2.Estimate 18 × 8 by rounding 18 to the nearest 10.
Answer: 160
- 18 rounds to 20
- 20 × 8 = 160
The exact answer is 144.
3.Estimate 288 + 666 by rounding each number to the nearest 100.
Answer: 1,000
- 288 rounds to 300; 666 rounds to 700
- 300 + 700 = 1,000
The exact answer is 954, close to the estimate.
4.Estimate 39 × 6 by rounding 39 to the nearest 10.
Answer: 240
- 39 rounds to 40
- 40 × 6 = 240
The exact answer is 234.
5.Estimate 574 + 506 by rounding each number to the nearest 100.
Answer: 1,100
- 574 rounds to 600; 506 rounds to 500
- 600 + 500 = 1,100
The exact answer is 1,080, close to the estimate.
6.Estimate 57 × 8 by rounding 57 to the nearest 10.
Answer: 480
- 57 rounds to 60
- 60 × 8 = 480
The exact answer is 456.
7.Estimate 532 + 905 by rounding each number to the nearest 100.
Answer: 1,400
- 532 rounds to 500; 905 rounds to 900
- 500 + 900 = 1,400
The exact answer is 1,437, close to the estimate.
8.Estimate 87 × 5 by rounding 87 to the nearest 10.
Answer: 450
- 87 rounds to 90
- 90 × 5 = 450
The exact answer is 435.
9.Estimate 856 + 286 by rounding each number to the nearest 100.
Answer: 1,200
- 856 rounds to 900; 286 rounds to 300
- 900 + 300 = 1,200
The exact answer is 1,142, close to the estimate.
10.Estimate 88 × 8 by rounding 88 to the nearest 10.
Answer: 720
- 88 rounds to 90
- 90 × 8 = 720
The exact answer is 704.
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.