Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 385 · 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 29227 to the nearest hundred.
2. 2.Round 73.66 to one decimal place. =
3. 3.Which is closest to 1198 ÷ 29? (a) 20 (b) 400 (c) 80 (d) 40
4. 4.Round 32.11 to one decimal place. =
5. 5.Round 82.54 to one decimal place. =
6. 6.Round 27898 to the nearest hundred.
7. 7.Round 16.88 to one decimal place. =
8. 8.Which is closest to 603 × 62? (Round each number first.) (a) 3600 (b) 36000 (c) 72000 (d) 360000
9. 9.Which is closest to 793 ÷ 39? (a) 40 (b) 10 (c) 20 (d) 200
10. 10.Which is closest to 797 × 82? (Round each number first.) (a) 64000 (b) 6400 (c) 640000 (d) 128000
11. 11.Round 29756 to the nearest thousand.
12. 12.Round 83526 to the nearest thousand.
13. 13.Which is closest to 803 × 79? (Round each number first.) (a) 640000 (b) 64000 (c) 6400 (d) 128000
14. 14.Round 52.94 to one decimal place. =
15. 15.Which is closest to 302 × 22? (Round each number first.) (a) 600 (b) 6000 (c) 12000 (d) 60000
16. 16.Round 44729 to the nearest hundred.
17. 17.Round 30.16 to one decimal place. =
18. 18.Which is closest to 201 × 92? (Round each number first.) (a) 18000 (b) 180000 (c) 1800 (d) 36000
19. 19.Round 47.17 to one decimal place. =
20. 20.Round 61975 to the nearest thousand.
21. 21.Round 72.87 to one decimal place. =
22. 22.Round 55.91 to one decimal place. =
23. 23.Which is closest to 699 + 295 + 804? (a) 1900 (b) 1800 (c) 2000 (d) 1700
24. 24.Round 41631 to the nearest hundred.
25. 25.Round 54017 to the nearest thousand.
26. 26.Round 60202 to the nearest hundred.
27. 27.Which is closest to 299 × 81? (Round each number first.) (a) 48000 (b) 2400 (c) 24000 (d) 240000
28. 28.Which is closest to 599 × 21? (Round each number first.) (a) 120000 (b) 24000 (c) 1200 (d) 12000
29. 29.Which is closest to 993 ÷ 19? (a) 500 (b) 50 (c) 25 (d) 100
30. 30.Which is closest to 204 × 21? (Round each number first.) (a) 400 (b) 4000 (c) 8000 (d) 40000
31. 31.Round 3394 to the nearest hundred.
32. 32.Round 55940 to the nearest thousand.
33. 33.Which is closest to 202 + 699 + 798? (a) 1900 (b) 1600 (c) 1700 (d) 1800
34. 34.Round 84.87 to one decimal place. =
35. 35.Which is closest to 597 × 81? (Round each number first.) (a) 96000 (b) 4800 (c) 480000 (d) 48000
36. 36.Which is closest to 1192 ÷ 21? (a) 30 (b) 120 (c) 60 (d) 600
37. 37.Round 86283 to the nearest ten.
38. 38.Which is closest to 197 + 901 + 201? (a) 1500 (b) 1200 (c) 1400 (d) 1300
39. 39.Round 61299 to the nearest hundred.
40. 40.Round 89531 to the nearest ten.

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