Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 719 · 40 questions

The method (Round, then calculate): Round each number to the nearest ten, hundred or whole number. Do the easy sum with the rounded numbers. Pick the option nearest to it. To round a number, look at the digit after the place you keep: 5 or more goes up, less than 5 stays.

1. 1.Round 74.74 to one decimal place. =
2. 2.Which is closest to 400 × 88? (Round each number first.) (a) 360000 (b) 72000 (c) 3600 (d) 36000
3. 3.Which is closest to 499 + 198 + 704? (a) 1600 (b) 1300 (c) 1400 (d) 1500
4. 4.Which is closest to 703 × 68? (Round each number first.) (a) 4900 (b) 49000 (c) 98000 (d) 490000
5. 5.Round 91131 to the nearest hundred.
6. 6.Which is closest to 297 × 82? (Round each number first.) (a) 240000 (b) 48000 (c) 24000 (d) 2400
7. 7.Round 94.18 to one decimal place. =
8. 8.Which is closest to 501 × 40? (Round each number first.) (a) 200000 (b) 2000 (c) 40000 (d) 20000
9. 9.Round 59.42 to one decimal place. =
10. 10.Which is closest to 601 + 599 + 300? (a) 1700 (b) 1400 (c) 1600 (d) 1500
11. 11.Which is closest to 296 × 28? (Round each number first.) (a) 9000 (b) 900 (c) 18000 (d) 90000
12. 12.Which is closest to 799 + 396 + 304? (a) 1400 (b) 1700 (c) 1600 (d) 1500
13. 13.Which is closest to 400 × 69? (Round each number first.) (a) 2800 (b) 56000 (c) 28000 (d) 280000
14. 14.Which is closest to 402 ÷ 19? (a) 10 (b) 40 (c) 200 (d) 20
15. 15.Which is closest to 601 × 80? (Round each number first.) (a) 48000 (b) 4800 (c) 96000 (d) 480000
16. 16.Which is closest to 902 ÷ 31? (a) 300 (b) 15 (c) 30 (d) 60
17. 17.Which is closest to 404 × 78? (Round each number first.) (a) 32000 (b) 64000 (c) 3200 (d) 320000
18. 18.Which is closest to 200 × 32? (Round each number first.) (a) 600 (b) 12000 (c) 60000 (d) 6000
19. 19.Which is closest to 604 × 40? (Round each number first.) (a) 2400 (b) 24000 (c) 48000 (d) 240000
20. 20.Round 16.39 to one decimal place. =
21. 21.Which is closest to 1595 ÷ 39? (a) 20 (b) 80 (c) 40 (d) 400
22. 22.Which is closest to 804 + 802 + 499? (a) 2300 (b) 2200 (c) 2000 (d) 2100
23. 23.Round 94.14 to one decimal place. =
24. 24.Round 37652 to the nearest thousand.
25. 25.Which is closest to 704 × 91? (Round each number first.) (a) 630000 (b) 126000 (c) 6300 (d) 63000
26. 26.Round 91153 to the nearest hundred.
27. 27.Which is closest to 300 × 19? (Round each number first.) (a) 6000 (b) 600 (c) 60000 (d) 12000
28. 28.Which is closest to 807 ÷ 41? (a) 200 (b) 40 (c) 20 (d) 10
29. 29.Which is closest to 396 × 79? (Round each number first.) (a) 320000 (b) 32000 (c) 64000 (d) 3200
30. 30.Round 86819 to the nearest thousand.
31. 31.Round 19.46 to one decimal place. =
32. 32.Which is closest to 907 ÷ 31? (a) 15 (b) 30 (c) 60 (d) 300
33. 33.Round 41719 to the nearest thousand.
34. 34.Which is closest to 305 + 595 + 596? (a) 1400 (b) 1600 (c) 1500 (d) 1700
35. 35.Round 21.56 to one decimal place. =
36. 36.Which is closest to 299 × 70? (Round each number first.) (a) 42000 (b) 2100 (c) 210000 (d) 21000
37. 37.Which is closest to 503 × 28? (Round each number first.) (a) 150000 (b) 1500 (c) 30000 (d) 15000
38. 38.Which is closest to 3593 ÷ 39? (a) 90 (b) 900 (c) 45 (d) 180
39. 39.Round 55991 to the nearest ten.
40. 40.Which is closest to 797 + 798 + 905? (a) 2400 (b) 2500 (c) 2700 (d) 2600

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