Year 4 Estimating Sums, Differences and Products Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the Year 4 place value worksheet.
Success TutoringWorksheetsAnswer sheetYear 4 · Mathematics · Place ValueYear 4 Estimating Sums, Differences and Products Worksheet — Level 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 9,094 + 4,676 by rounding each number to the nearest 1,000.
Answer: 14,000
- 9,094 rounds to 9,000; 4,676 rounds to 5,000
- 9,000 + 5,000 = 14,000
The exact answer is 13,770, close to the estimate.
2.Estimate 53 × 56 by rounding each number to the nearest 10.
Answer: 3,000
- 53 rounds to 50; 56 rounds to 60
- 50 × 60 = 3,000
The exact answer is 2,968.
3.Estimate 14 × 6 by rounding 14 to the nearest 10.
Answer: 60
- 14 rounds to 10
- 10 × 6 = 60
The exact answer is 84.
4.Estimate 4,092 − 1,074 by rounding each number to the nearest 100.
Answer: 3,000
- 4,092 rounds to 4,100; 1,074 rounds to 1,100
- 4,100 − 1,100 = 3,000
The exact answer is 3,018, close to the estimate.
5.Estimate 19 × 16 by rounding each number to the nearest 10.
Answer: 400
- 19 rounds to 20; 16 rounds to 20
- 20 × 20 = 400
The exact answer is 304.
6.Estimate 82 × 8 by rounding 82 to the nearest 10.
Answer: 640
- 82 rounds to 80
- 80 × 8 = 640
The exact answer is 656.
7.Estimate 6,441 − 1,048 by rounding each number to the nearest 1,000.
Answer: 5,000
- 6,441 rounds to 6,000; 1,048 rounds to 1,000
- 6,000 − 1,000 = 5,000
The exact answer is 5,393, close to the estimate.
8.Estimate 68 × 56 by rounding each number to the nearest 10.
Answer: 4,200
- 68 rounds to 70; 56 rounds to 60
- 70 × 60 = 4,200
The exact answer is 3,808.
9.Estimate 58 × 13 by rounding each number to the nearest 10.
Answer: 600
- 58 rounds to 60; 13 rounds to 10
- 60 × 10 = 600
The exact answer is 754.
10.Estimate 2,533 + 5,005 by rounding each number to the nearest 100.
Answer: 7,500
- 2,533 rounds to 2,500; 5,005 rounds to 5,000
- 2,500 + 5,000 = 7,500
The exact answer is 7,538, close to the estimate.
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