Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 240 · 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 57829 to the nearest hundred.
2. 2.Round 59432 to the nearest thousand.
3. 3.Which is closest to 601 × 58? (Round each number first.) (a) 72000 (b) 3600 (c) 36000 (d) 360000
4. 4.Round 70.17 to one decimal place. =
5. 5.Round 59012 to the nearest ten.
6. 6.Which is closest to 1005 ÷ 21? (a) 100 (b) 25 (c) 500 (d) 50
7. 7.Which is closest to 798 × 58? (Round each number first.) (a) 4800 (b) 48000 (c) 480000 (d) 96000
8. 8.Round 85.27 to one decimal place. =
9. 9.Which is closest to 602 + 304 + 198? (a) 1200 (b) 1300 (c) 1100 (d) 1000
10. 10.Which is closest to 302 + 805 + 198? (a) 1200 (b) 1500 (c) 1300 (d) 1400
11. 11.Which is closest to 896 × 21? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
12. 12.Which is closest to 604 × 70? (Round each number first.) (a) 420000 (b) 42000 (c) 4200 (d) 84000
13. 13.Which is closest to 199 × 92? (Round each number first.) (a) 180000 (b) 1800 (c) 36000 (d) 18000
14. 14.Which is closest to 2701 ÷ 29? (a) 45 (b) 90 (c) 900 (d) 180
15. 15.Which is closest to 400 + 495 + 197? (a) 1300 (b) 1000 (c) 1100 (d) 1200
16. 16.Which is closest to 504 × 69? (Round each number first.) (a) 35000 (b) 70000 (c) 3500 (d) 350000
17. 17.Which is closest to 496 × 21? (Round each number first.) (a) 1000 (b) 10000 (c) 100000 (d) 20000
18. 18.Which is closest to 296 + 105 + 701? (a) 1000 (b) 1300 (c) 1200 (d) 1100
19. 19.Which is closest to 302 × 42? (Round each number first.) (a) 24000 (b) 1200 (c) 12000 (d) 120000
20. 20.Round 73.28 to one decimal place. =
21. 21.Which is closest to 896 + 96 + 900? (a) 2000 (b) 2100 (c) 1800 (d) 1900
22. 22.Round 16.12 to one decimal place. =
23. 23.Round 40723 to the nearest hundred.
24. 24.Which is closest to 1200 ÷ 21? (a) 30 (b) 60 (c) 600 (d) 120
25. 25.Which is closest to 804 × 31? (Round each number first.) (a) 48000 (b) 240000 (c) 24000 (d) 2400
26. 26.Which is closest to 296 × 58? (Round each number first.) (a) 18000 (b) 180000 (c) 1800 (d) 36000
27. 27.Which is closest to 700 + 98 + 104? (a) 1100 (b) 800 (c) 1000 (d) 900
28. 28.Which is closest to 600 × 58? (Round each number first.) (a) 72000 (b) 3600 (c) 36000 (d) 360000
29. 29.Which is closest to 197 × 82? (Round each number first.) (a) 16000 (b) 32000 (c) 160000 (d) 1600
30. 30.Which is closest to 498 + 803 + 204? (a) 1500 (b) 1600 (c) 1400 (d) 1700
31. 31.Round 77.22 to one decimal place. =
32. 32.Round 62787 to the nearest ten.
33. 33.Round 16519 to the nearest hundred.
34. 34.Which is closest to 100 + 401 + 499? (a) 1000 (b) 1100 (c) 1200 (d) 900
35. 35.Round 87872 to the nearest thousand.
36. 36.Which is closest to 203 × 48? (Round each number first.) (a) 10000 (b) 1000 (c) 100000 (d) 20000
37. 37.Which is closest to 200 × 28? (Round each number first.) (a) 12000 (b) 6000 (c) 600 (d) 60000
38. 38.Which is closest to 399 × 18? (Round each number first.) (a) 80000 (b) 8000 (c) 800 (d) 16000
39. 39.Which is closest to 404 × 88? (Round each number first.) (a) 36000 (b) 3600 (c) 360000 (d) 72000
40. 40.Round 87.84 to one decimal place. =

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