Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 401 · 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 32663 to the nearest hundred.
2. 2.Round 2482 to the nearest ten.
3. 3.Which is closest to 498 + 201 + 305? (a) 900 (b) 1100 (c) 1000 (d) 1200
4. 4.Round 66.64 to one decimal place. =
5. 5.Which is closest to 197 + 100 + 699? (a) 1100 (b) 1200 (c) 900 (d) 1000
6. 6.Which is closest to 802 × 58? (Round each number first.) (a) 96000 (b) 480000 (c) 4800 (d) 48000
7. 7.Which is closest to 704 + 900 + 705? (a) 2200 (b) 2500 (c) 2300 (d) 2400
8. 8.Round 56.37 to one decimal place. =
9. 9.Which is closest to 798 × 69? (Round each number first.) (a) 112000 (b) 56000 (c) 5600 (d) 560000
10. 10.Round 11.06 to one decimal place. =
11. 11.Which is closest to 2805 ÷ 41? (a) 35 (b) 140 (c) 700 (d) 70
12. 12.Round 94532 to the nearest ten.
13. 13.Which is closest to 297 × 39? (Round each number first.) (a) 12000 (b) 24000 (c) 120000 (d) 1200
14. 14.Round 24916 to the nearest ten.
15. 15.Which is closest to 798 + 603 + 97? (a) 1600 (b) 1400 (c) 1700 (d) 1500
16. 16.Which is closest to 403 × 50? (Round each number first.) (a) 20000 (b) 2000 (c) 40000 (d) 200000
17. 17.Round 11666 to the nearest ten.
18. 18.Which is closest to 591 ÷ 19? (a) 60 (b) 30 (c) 15 (d) 300
19. 19.Round 38.89 to one decimal place. =
20. 20.Which is closest to 899 × 62? (Round each number first.) (a) 108000 (b) 5400 (c) 54000 (d) 540000
21. 21.Which is closest to 100 + 304 + 401? (a) 900 (b) 700 (c) 1000 (d) 800
22. 22.Which is closest to 899 + 900 + 501? (a) 2400 (b) 2500 (c) 2200 (d) 2300
23. 23.Round 68.88 to one decimal place. =
24. 24.Which is closest to 396 × 92? (Round each number first.) (a) 36000 (b) 72000 (c) 360000 (d) 3600
25. 25.Which is closest to 801 + 103 + 504? (a) 1500 (b) 1400 (c) 1600 (d) 1300
26. 26.Which is closest to 696 + 601 + 200? (a) 1600 (b) 1400 (c) 1500 (d) 1700
27. 27.Which is closest to 402 + 405 + 405? (a) 1400 (b) 1300 (c) 1100 (d) 1200
28. 28.Which is closest to 900 + 397 + 296? (a) 1800 (b) 1600 (c) 1500 (d) 1700
29. 29.Which is closest to 698 + 99 + 295? (a) 1100 (b) 1200 (c) 1000 (d) 1300
30. 30.Round 41.93 to one decimal place. =
31. 31.Which is closest to 501 × 41? (Round each number first.) (a) 2000 (b) 20000 (c) 200000 (d) 40000
32. 32.Which is closest to 797 × 28? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
33. 33.Which is closest to 204 + 700 + 605? (a) 1400 (b) 1500 (c) 1600 (d) 1700
34. 34.Which is closest to 297 × 29? (Round each number first.) (a) 900 (b) 9000 (c) 90000 (d) 18000
35. 35.Round 64.11 to one decimal place. =
36. 36.Which is closest to 606 ÷ 29? (a) 10 (b) 40 (c) 200 (d) 20
37. 37.Which is closest to 696 × 30? (Round each number first.) (a) 210000 (b) 2100 (c) 21000 (d) 42000
38. 38.Which is closest to 698 × 69? (Round each number first.) (a) 490000 (b) 98000 (c) 4900 (d) 49000
39. 39.Which is closest to 297 × 28? (Round each number first.) (a) 18000 (b) 900 (c) 9000 (d) 90000
40. 40.Round 96.79 to one decimal place. =

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