6th Grade Estimating Sums, Differences and Products Worksheet — Level 3 — Practice Set 2 — 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 3 — Practice Set 2 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 7,076 + 7,390 by rounding each number to the nearest 1,000.
Answer: 14,000
- 7,076 rounds to 7,000; 7,390 rounds to 7,000
- 7,000 + 7,000 = 14,000
The exact answer is 14,466, close to the estimate.
2.Estimate 82 × 62 by rounding each number to the nearest 10.
Answer: 4,800
- 82 rounds to 80; 62 rounds to 60
- 80 × 60 = 4,800
The exact answer is 5,084.
3.Estimate 69 × 48 by rounding each number to the nearest 10.
Answer: 3,500
- 69 rounds to 70; 48 rounds to 50
- 70 × 50 = 3,500
The exact answer is 3,312.
4.Estimate 6,699 − 5,538 by rounding each number to the nearest 1,000.
Answer: 1,000
- 6,699 rounds to 7,000; 5,538 rounds to 6,000
- 7,000 − 6,000 = 1,000
The exact answer is 1,161, close to the estimate.
5.Estimate 31 × 75 by rounding each number to the nearest 10.
Answer: 2,400
- 31 rounds to 30; 75 rounds to 80
- 30 × 80 = 2,400
The exact answer is 2,325.
6.Estimate 21 × 48 by rounding each number to the nearest 10.
Answer: 1,000
- 21 rounds to 20; 48 rounds to 50
- 20 × 50 = 1,000
The exact answer is 1,008.
7.Estimate 2,910 + 9,560 by rounding each number to the nearest 100.
Answer: 12,500
- 2,910 rounds to 2,900; 9,560 rounds to 9,600
- 2,900 + 9,600 = 12,500
The exact answer is 12,470, close to the estimate.
8.Estimate 61 × 21 by rounding each number to the nearest 10.
Answer: 1,200
- 61 rounds to 60; 21 rounds to 20
- 60 × 20 = 1,200
The exact answer is 1,281.
9.Estimate 49 × 4 by rounding 49 to the nearest 10.
Answer: 200
- 49 rounds to 50
- 50 × 4 = 200
The exact answer is 196.
10.Estimate 7,641 + 6,358 by rounding each number to the nearest 100.
Answer: 14,000
- 7,641 rounds to 7,600; 6,358 rounds to 6,400
- 7,600 + 6,400 = 14,000
The exact answer is 13,999, close to the estimate.
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
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