Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 821 · 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 1499 ÷ 49? (a) 60 (b) 300 (c) 15 (d) 30
2. 2.Round 60.27 to one decimal place. =
3. 3.Which is closest to 202 + 298 + 296? (a) 700 (b) 800 (c) 900 (d) 1000
4. 4.Which is closest to 1504 ÷ 51? (a) 300 (b) 30 (c) 15 (d) 60
5. 5.Which is closest to 204 + 297 + 601? (a) 1300 (b) 1100 (c) 1000 (d) 1200
6. 6.Round 29.54 to one decimal place. =
7. 7.Which is closest to 304 × 71? (Round each number first.) (a) 42000 (b) 21000 (c) 210000 (d) 2100
8. 8.Round 86.88 to one decimal place. =
9. 9.Which is closest to 396 × 59? (Round each number first.) (a) 240000 (b) 24000 (c) 48000 (d) 2400
10. 10.Round 88.12 to one decimal place. =
11. 11.Round 62855 to the nearest thousand.
12. 12.Which is closest to 700 × 68? (Round each number first.) (a) 490000 (b) 4900 (c) 98000 (d) 49000
13. 13.Which is closest to 800 + 696 + 796? (a) 2500 (b) 2200 (c) 2300 (d) 2400
14. 14.Round 60360 to the nearest thousand.
15. 15.Which is closest to 2696 ÷ 31? (a) 900 (b) 45 (c) 180 (d) 90
16. 16.Round 31.89 to one decimal place. =
17. 17.Round 65.42 to one decimal place. =
18. 18.Which is closest to 396 + 298 + 598? (a) 1200 (b) 1500 (c) 1400 (d) 1300
19. 19.Which is closest to 999 ÷ 51? (a) 10 (b) 20 (c) 200 (d) 40
20. 20.Round 71965 to the nearest hundred.
21. 21.Round 10447 to the nearest hundred.
22. 22.Round 5350 to the nearest thousand.
23. 23.Round 2638 to the nearest ten.
24. 24.Which is closest to 604 × 29? (Round each number first.) (a) 36000 (b) 180000 (c) 18000 (d) 1800
25. 25.Which is closest to 97 + 101 + 303? (a) 700 (b) 600 (c) 400 (d) 500
26. 26.Round 28511 to the nearest hundred.
27. 27.Which is closest to 801 × 82? (Round each number first.) (a) 128000 (b) 64000 (c) 6400 (d) 640000
28. 28.Which is closest to 505 + 398 + 597? (a) 1400 (b) 1600 (c) 1700 (d) 1500
29. 29.Which is closest to 601 + 101 + 405? (a) 1200 (b) 1100 (c) 1000 (d) 1300
30. 30.Round 28.92 to one decimal place. =
31. 31.Round 7854 to the nearest ten.
32. 32.Which is closest to 1791 ÷ 19? (a) 900 (b) 45 (c) 90 (d) 180
33. 33.Which is closest to 496 × 41? (Round each number first.) (a) 2000 (b) 200000 (c) 40000 (d) 20000
34. 34.Round 15717 to the nearest ten.
35. 35.Round 62280 to the nearest thousand.
36. 36.Which is closest to 1006 ÷ 19? (a) 500 (b) 100 (c) 25 (d) 50
37. 37.Round 29.42 to one decimal place. =
38. 38.Which is closest to 399 × 89? (Round each number first.) (a) 360000 (b) 72000 (c) 3600 (d) 36000
39. 39.Which is closest to 897 × 22? (Round each number first.) (a) 1800 (b) 18000 (c) 36000 (d) 180000
40. 40.Which is closest to 501 + 398 + 301? (a) 1400 (b) 1200 (c) 1300 (d) 1100

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