Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 200 · 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.Which is closest to 2103 ÷ 29? (a) 700 (b) 70 (c) 35 (d) 140
2. 2.Which is closest to 203 × 29? (Round each number first.) (a) 12000 (b) 600 (c) 6000 (d) 60000
3. 3.Which is closest to 495 + 802 + 695? (a) 2200 (b) 2000 (c) 2100 (d) 1900
4. 4.Which is closest to 402 × 78? (Round each number first.) (a) 64000 (b) 32000 (c) 320000 (d) 3200
5. 5.Round 94727 to the nearest thousand.
6. 6.Round 82618 to the nearest ten.
7. 7.Round 84707 to the nearest ten.
8. 8.Which is closest to 704 × 40? (Round each number first.) (a) 28000 (b) 2800 (c) 280000 (d) 56000
9. 9.Which is closest to 1801 ÷ 29? (a) 600 (b) 30 (c) 120 (d) 60
10. 10.Round 96.76 to one decimal place. =
11. 11.Which is closest to 198 × 68? (Round each number first.) (a) 140000 (b) 14000 (c) 1400 (d) 28000
12. 12.Round 49111 to the nearest hundred.
13. 13.Which is closest to 199 × 68? (Round each number first.) (a) 140000 (b) 1400 (c) 14000 (d) 28000
14. 14.Which is closest to 297 × 60? (Round each number first.) (a) 36000 (b) 18000 (c) 180000 (d) 1800
15. 15.Which is closest to 700 × 59? (Round each number first.) (a) 4200 (b) 420000 (c) 84000 (d) 42000
16. 16.Round 88199 to the nearest thousand.
17. 17.Round 12338 to the nearest thousand.
18. 18.Round 84.28 to one decimal place. =
19. 19.Which is closest to 802 × 32? (Round each number first.) (a) 48000 (b) 2400 (c) 24000 (d) 240000
20. 20.Round 66744 to the nearest ten.
21. 21.Round 65078 to the nearest thousand.
22. 22.Which is closest to 2492 ÷ 51? (a) 50 (b) 25 (c) 500 (d) 100
23. 23.Which is closest to 4492 ÷ 49? (a) 180 (b) 90 (c) 900 (d) 45
24. 24.Which is closest to 596 + 495 + 700? (a) 1800 (b) 1700 (c) 2000 (d) 1900
25. 25.Which is closest to 204 × 18? (Round each number first.) (a) 8000 (b) 4000 (c) 400 (d) 40000
26. 26.Round 56585 to the nearest thousand.
27. 27.Which is closest to 1005 ÷ 49? (a) 200 (b) 10 (c) 40 (d) 20
28. 28.Which is closest to 297 + 198 + 198? (a) 800 (b) 600 (c) 900 (d) 700
29. 29.Which is closest to 797 × 60? (Round each number first.) (a) 4800 (b) 96000 (c) 480000 (d) 48000
30. 30.Which is closest to 204 + 897 + 405? (a) 1700 (b) 1600 (c) 1500 (d) 1400
31. 31.Which is closest to 1797 ÷ 21? (a) 45 (b) 90 (c) 900 (d) 180
32. 32.Round 62427 to the nearest thousand.
33. 33.Round 52.28 to one decimal place. =
34. 34.Round 71683 to the nearest ten.
35. 35.Which is closest to 696 × 91? (Round each number first.) (a) 630000 (b) 126000 (c) 63000 (d) 6300
36. 36.Round 66711 to the nearest ten.
37. 37.Round 42.14 to one decimal place. =
38. 38.Round 9449 to the nearest hundred.
39. 39.Round 90764 to the nearest ten.
40. 40.Which is closest to 597 × 39? (Round each number first.) (a) 24000 (b) 2400 (c) 240000 (d) 48000

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