6th Grade Estimating Sums, Differences and Products Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 6th Grade place value worksheet.
Success TutoringWorksheetsAnswer sheet6th Grade · Mathematics · Place Value6th Grade 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 177 + 607 by rounding each number to the nearest 100.
Answer: 800
- 177 rounds to 200; 607 rounds to 600
- 200 + 600 = 800
The exact answer is 784, close to the estimate.
2.Estimate 92 × 4 by rounding 92 to the nearest 10.
Answer: 360
- 92 rounds to 90
- 90 × 4 = 360
The exact answer is 368.
3.Estimate 849 + 762 by rounding each number to the nearest 100.
Answer: 1,600
- 849 rounds to 800; 762 rounds to 800
- 800 + 800 = 1,600
The exact answer is 1,611, close to the estimate.
4.Estimate 65 × 7 by rounding 65 to the nearest 10.
Answer: 490
- 65 rounds to 70
- 70 × 7 = 490
The exact answer is 455.
5.Estimate 125 + 756 by rounding each number to the nearest 100.
Answer: 900
- 125 rounds to 100; 756 rounds to 800
- 100 + 800 = 900
The exact answer is 881, close to the estimate.
6.Estimate 27 × 9 by rounding 27 to the nearest 10.
Answer: 270
- 27 rounds to 30
- 30 × 9 = 270
The exact answer is 243.
7.Estimate 978 − 120 by rounding each number to the nearest 100.
Answer: 900
- 978 rounds to 1,000; 120 rounds to 100
- 1,000 − 100 = 900
The exact answer is 858, close to the estimate.
8.Estimate 31 × 9 by rounding 31 to the nearest 10.
Answer: 270
- 31 rounds to 30
- 30 × 9 = 270
The exact answer is 279.
9.Estimate 609 + 106 by rounding each number to the nearest 100.
Answer: 700
- 609 rounds to 600; 106 rounds to 100
- 600 + 100 = 700
The exact answer is 715, 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.