Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 575 · 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 86015 to the nearest hundred.
2. 2.Which is closest to 603 ÷ 21? (a) 30 (b) 300 (c) 60 (d) 15
3. 3.Which is closest to 202 × 60? (Round each number first.) (a) 12000 (b) 24000 (c) 1200 (d) 120000
4. 4.Which is closest to 895 + 298 + 605? (a) 1700 (b) 1900 (c) 2000 (d) 1800
5. 5.Round 44.63 to one decimal place. =
6. 6.Round 59412 to the nearest thousand.
7. 7.Which is closest to 296 + 897 + 600? (a) 2000 (b) 1900 (c) 1700 (d) 1800
8. 8.Round 93.47 to one decimal place. =
9. 9.Which is closest to 801 + 699 + 796? (a) 2300 (b) 2500 (c) 2400 (d) 2200
10. 10.Round 12.16 to one decimal place. =
11. 11.Which is closest to 1609 ÷ 41? (a) 80 (b) 40 (c) 400 (d) 20
12. 12.Which is closest to 399 + 801 + 902? (a) 2200 (b) 2100 (c) 2300 (d) 2000
13. 13.Which is closest to 2502 ÷ 49? (a) 500 (b) 25 (c) 100 (d) 50
14. 14.Round 21589 to the nearest ten.
15. 15.Round 64252 to the nearest thousand.
16. 16.Which is closest to 198 + 695 + 105? (a) 1200 (b) 1000 (c) 900 (d) 1100
17. 17.Round 50406 to the nearest hundred.
18. 18.Which is closest to 701 + 304 + 395? (a) 1600 (b) 1400 (c) 1300 (d) 1500
19. 19.Which is closest to 298 × 82? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
20. 20.Which is closest to 1997 ÷ 39? (a) 50 (b) 100 (c) 25 (d) 500
21. 21.Which is closest to 297 × 18? (Round each number first.) (a) 60000 (b) 6000 (c) 600 (d) 12000
22. 22.Which is closest to 297 × 28? (Round each number first.) (a) 18000 (b) 9000 (c) 90000 (d) 900
23. 23.Round 53497 to the nearest thousand.
24. 24.Round 17975 to the nearest hundred.
25. 25.Which is closest to 2798 ÷ 41? (a) 35 (b) 140 (c) 70 (d) 700
26. 26.Which is closest to 501 × 89? (Round each number first.) (a) 450000 (b) 4500 (c) 45000 (d) 90000
27. 27.Which is closest to 4491 ÷ 49? (a) 90 (b) 45 (c) 180 (d) 900
28. 28.Round 7630 to the nearest thousand.
29. 29.Round 93533 to the nearest hundred.
30. 30.Which is closest to 903 + 296 + 804? (a) 2200 (b) 2000 (c) 2100 (d) 1900
31. 31.Which is closest to 296 × 20? (Round each number first.) (a) 600 (b) 6000 (c) 60000 (d) 12000
32. 32.Which is closest to 1601 ÷ 39? (a) 400 (b) 80 (c) 20 (d) 40
33. 33.Round 31434 to the nearest hundred.
34. 34.Round 94956 to the nearest thousand.
35. 35.Which is closest to 598 × 70? (Round each number first.) (a) 4200 (b) 84000 (c) 42000 (d) 420000
36. 36.Round 96049 to the nearest thousand.
37. 37.Which is closest to 796 + 102 + 803? (a) 1900 (b) 1800 (c) 1700 (d) 1600
38. 38.Round 96.53 to one decimal place. =
39. 39.Which is closest to 1602 ÷ 41? (a) 20 (b) 40 (c) 80 (d) 400
40. 40.Round 17.89 to one decimal place. =

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