Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 175 · 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 81.93 to one decimal place. =
2. 2.Which is closest to 2006 ÷ 49? (a) 20 (b) 400 (c) 40 (d) 80
3. 3.Round 46702 to the nearest thousand.
4. 4.Which is closest to 792 ÷ 41? (a) 10 (b) 20 (c) 200 (d) 40
5. 5.Round 98.91 to one decimal place. =
6. 6.Round 75989 to the nearest ten.
7. 7.Which is closest to 800 × 59? (Round each number first.) (a) 48000 (b) 96000 (c) 4800 (d) 480000
8. 8.Which is closest to 1007 ÷ 49? (a) 40 (b) 10 (c) 20 (d) 200
9. 9.Which is closest to 907 ÷ 31? (a) 15 (b) 30 (c) 60 (d) 300
10. 10.Which is closest to 699 + 105 + 203? (a) 1200 (b) 1000 (c) 1100 (d) 900
11. 11.Which is closest to 196 × 52? (Round each number first.) (a) 1000 (b) 10000 (c) 20000 (d) 100000
12. 12.Round 12939 to the nearest hundred.
13. 13.Which is closest to 700 × 48? (Round each number first.) (a) 70000 (b) 350000 (c) 3500 (d) 35000
14. 14.Round 18431 to the nearest ten.
15. 15.Which is closest to 499 + 904 + 197? (a) 1500 (b) 1700 (c) 1600 (d) 1800
16. 16.Round 69.84 to one decimal place. =
17. 17.Which is closest to 197 + 101 + 698? (a) 900 (b) 1200 (c) 1100 (d) 1000
18. 18.Which is closest to 1992 ÷ 41? (a) 100 (b) 500 (c) 50 (d) 25
19. 19.Round 70.91 to one decimal place. =
20. 20.Round 6850 to the nearest thousand.
21. 21.Which is closest to 102 + 903 + 101? (a) 1300 (b) 1100 (c) 1200 (d) 1000
22. 22.Which is closest to 597 ÷ 31? (a) 20 (b) 200 (c) 10 (d) 40
23. 23.Round 26043 to the nearest hundred.
24. 24.Which is closest to 95 + 696 + 897? (a) 1700 (b) 1900 (c) 1800 (d) 1600
25. 25.Which is closest to 101 + 195 + 695? (a) 1000 (b) 1100 (c) 900 (d) 1200
26. 26.Round 79.37 to one decimal place. =
27. 27.Round 1743 to the nearest ten.
28. 28.Round 26402 to the nearest ten.
29. 29.Round 4863 to the nearest ten.
30. 30.Which is closest to 404 + 697 + 705? (a) 1700 (b) 1800 (c) 2000 (d) 1900
31. 31.Round 76.54 to one decimal place. =
32. 32.Which is closest to 200 × 38? (Round each number first.) (a) 80000 (b) 8000 (c) 16000 (d) 800
33. 33.Round 57.94 to one decimal place. =
34. 34.Which is closest to 298 × 39? (Round each number first.) (a) 120000 (b) 1200 (c) 12000 (d) 24000
35. 35.Round 21548 to the nearest ten.
36. 36.Round 71.21 to one decimal place. =
37. 37.Round 6923 to the nearest ten.
38. 38.Round 97.56 to one decimal place. =
39. 39.Round 34283 to the nearest thousand.
40. 40.Round 92.87 to one decimal place. =

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