3rd Grade Estimating Sums, Differences and Products Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the 3rd Grade place value worksheet.
Success TutoringWorksheetsAnswer sheet3rd Grade · Mathematics · Place Value3rd Grade Estimating Sums, Differences and Products Worksheet — Level 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 4,885 − 3,248 by rounding each number to the nearest 100.
Answer: 1,700
- 4,885 rounds to 4,900; 3,248 rounds to 3,200
- 4,900 − 3,200 = 1,700
The exact answer is 1,637, close to the estimate.
2.Estimate 93 × 23 by rounding each number to the nearest 10.
Answer: 1,800
- 93 rounds to 90; 23 rounds to 20
- 90 × 20 = 1,800
The exact answer is 2,139.
3.Estimate 37 × 52 by rounding each number to the nearest 10.
Answer: 2,000
- 37 rounds to 40; 52 rounds to 50
- 40 × 50 = 2,000
The exact answer is 1,924.
4.Estimate 9,551 − 7,495 by rounding each number to the nearest 100.
Answer: 2,100
- 9,551 rounds to 9,600; 7,495 rounds to 7,500
- 9,600 − 7,500 = 2,100
The exact answer is 2,056, close to the estimate.
5.Estimate 52 × 42 by rounding each number to the nearest 10.
Answer: 2,000
- 52 rounds to 50; 42 rounds to 40
- 50 × 40 = 2,000
The exact answer is 2,184.
6.Estimate 14 × 6 by rounding 14 to the nearest 10.
Answer: 60
- 14 rounds to 10
- 10 × 6 = 60
The exact answer is 84.
7.Estimate 8,744 − 7,375 by rounding each number to the nearest 1,000.
Answer: 2,000
- 8,744 rounds to 9,000; 7,375 rounds to 7,000
- 9,000 − 7,000 = 2,000
The exact answer is 1,369, close to the estimate.
8.Estimate 97 × 62 by rounding each number to the nearest 10.
Answer: 6,000
- 97 rounds to 100; 62 rounds to 60
- 100 × 60 = 6,000
The exact answer is 6,014.
9.Estimate 83 × 38 by rounding each number to the nearest 10.
Answer: 3,200
- 83 rounds to 80; 38 rounds to 40
- 80 × 40 = 3,200
The exact answer is 3,154.
10.Estimate 6,442 − 1,989 by rounding each number to the nearest 1,000.
Answer: 4,000
- 6,442 rounds to 6,000; 1,989 rounds to 2,000
- 6,000 − 2,000 = 4,000
The exact answer is 4,453, close to the estimate.
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