5th Grade Estimating Sums, Differences and Products Worksheet — Level 3 — Practice Set 4 — 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 3 — Practice Set 4 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 8,847 + 8,261 by rounding each number to the nearest 1,000.
Answer: 17,000
- 8,847 rounds to 9,000; 8,261 rounds to 8,000
- 9,000 + 8,000 = 17,000
The exact answer is 17,108, close to the estimate.
2.Estimate 86 × 88 by rounding each number to the nearest 10.
Answer: 8,100
- 86 rounds to 90; 88 rounds to 90
- 90 × 90 = 8,100
The exact answer is 7,568.
3.Estimate 87 × 26 by rounding each number to the nearest 10.
Answer: 2,700
- 87 rounds to 90; 26 rounds to 30
- 90 × 30 = 2,700
The exact answer is 2,262.
4.Estimate 9,490 − 2,590 by rounding each number to the nearest 1,000.
Answer: 6,000
- 9,490 rounds to 9,000; 2,590 rounds to 3,000
- 9,000 − 3,000 = 6,000
The exact answer is 6,900, close to the estimate.
5.Estimate 81 × 94 by rounding each number to the nearest 10.
Answer: 7,200
- 81 rounds to 80; 94 rounds to 90
- 80 × 90 = 7,200
The exact answer is 7,614.
6.Estimate 81 × 8 by rounding 81 to the nearest 10.
Answer: 640
- 81 rounds to 80
- 80 × 8 = 640
The exact answer is 648.
7.Estimate 1,897 + 1,565 by rounding each number to the nearest 100.
Answer: 3,500
- 1,897 rounds to 1,900; 1,565 rounds to 1,600
- 1,900 + 1,600 = 3,500
The exact answer is 3,462, close to the estimate.
8.Estimate 41 × 44 by rounding each number to the nearest 10.
Answer: 1,600
- 41 rounds to 40; 44 rounds to 40
- 40 × 40 = 1,600
The exact answer is 1,804.
9.Estimate 69 × 7 by rounding 69 to the nearest 10.
Answer: 490
- 69 rounds to 70
- 70 × 7 = 490
The exact answer is 483.
10.Estimate 8,344 − 1,888 by rounding each number to the nearest 100.
Answer: 6,400
- 8,344 rounds to 8,300; 1,888 rounds to 1,900
- 8,300 − 1,900 = 6,400
The exact answer is 6,456, close to the estimate.
Marking tips
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