Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 280 · 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 16024 to the nearest ten.
2. 2.Round 87584 to the nearest ten.
3. 3.Round 93.42 to one decimal place. =
4. 4.Round 75172 to the nearest thousand.
5. 5.Round 11.53 to one decimal place. =
6. 6.Which is closest to 1797 ÷ 31? (a) 120 (b) 60 (c) 600 (d) 30
7. 7.Round 15622 to the nearest hundred.
8. 8.Which is closest to 499 × 38? (Round each number first.) (a) 200000 (b) 20000 (c) 2000 (d) 40000
9. 9.Which is closest to 396 × 68? (Round each number first.) (a) 28000 (b) 280000 (c) 56000 (d) 2800
10. 10.Which is closest to 98 + 903 + 203? (a) 1300 (b) 1100 (c) 1400 (d) 1200
11. 11.Which is closest to 597 + 496 + 405? (a) 1500 (b) 1600 (c) 1400 (d) 1700
12. 12.Round 77633 to the nearest thousand.
13. 13.Round 57604 to the nearest ten.
14. 14.Which is closest to 598 + 705 + 499? (a) 2000 (b) 1700 (c) 1900 (d) 1800
15. 15.Round 41.71 to one decimal place. =
16. 16.Which is closest to 2993 ÷ 51? (a) 120 (b) 600 (c) 30 (d) 60
17. 17.Which is closest to 1607 ÷ 39? (a) 400 (b) 40 (c) 80 (d) 20
18. 18.Round 74.16 to one decimal place. =
19. 19.Which is closest to 1592 ÷ 39? (a) 400 (b) 40 (c) 80 (d) 20
20. 20.Round 20.74 to one decimal place. =
21. 21.Round 89.81 to one decimal place. =
22. 22.Which is closest to 597 + 100 + 698? (a) 1500 (b) 1400 (c) 1300 (d) 1600
23. 23.Round 28.74 to one decimal place. =
24. 24.Which is closest to 200 × 32? (Round each number first.) (a) 600 (b) 60000 (c) 6000 (d) 12000
25. 25.Which is closest to 902 × 32? (Round each number first.) (a) 2700 (b) 27000 (c) 270000 (d) 54000
26. 26.Round 91.21 to one decimal place. =
27. 27.Round 17046 to the nearest thousand.
28. 28.Round 50.83 to one decimal place. =
29. 29.Which is closest to 897 × 18? (Round each number first.) (a) 180000 (b) 1800 (c) 18000 (d) 36000
30. 30.Which is closest to 202 + 900 + 204? (a) 1200 (b) 1400 (c) 1500 (d) 1300
31. 31.Round 48653 to the nearest ten.
32. 32.Which is closest to 2397 ÷ 29? (a) 80 (b) 40 (c) 160 (d) 800
33. 33.Which is closest to 803 × 18? (Round each number first.) (a) 32000 (b) 16000 (c) 1600 (d) 160000
34. 34.Round 87977 to the nearest ten.
35. 35.Round 49363 to the nearest ten.
36. 36.Round 60153 to the nearest ten.
37. 37.Round 12091 to the nearest ten.
38. 38.Round 94099 to the nearest ten.
39. 39.Round 25187 to the nearest ten.
40. 40.Which is closest to 204 + 496 + 898? (a) 1800 (b) 1700 (c) 1600 (d) 1500

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