Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 885 · 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 42147 to the nearest ten.
2. 2.Round 80232 to the nearest ten.
3. 3.Which is closest to 696 × 78? (Round each number first.) (a) 112000 (b) 5600 (c) 56000 (d) 560000
4. 4.Round 8948 to the nearest hundred.
5. 5.Which is closest to 1996 ÷ 49? (a) 400 (b) 20 (c) 80 (d) 40
6. 6.Which is closest to 296 + 396 + 205? (a) 1100 (b) 900 (c) 800 (d) 1000
7. 7.Round 78.34 to one decimal place. =
8. 8.Which is closest to 895 + 605 + 495? (a) 1900 (b) 2000 (c) 2200 (d) 2100
9. 9.Which is closest to 796 × 80? (Round each number first.) (a) 128000 (b) 6400 (c) 640000 (d) 64000
10. 10.Which is closest to 899 × 90? (Round each number first.) (a) 162000 (b) 8100 (c) 810000 (d) 81000
11. 11.Which is closest to 1498 ÷ 49? (a) 60 (b) 300 (c) 30 (d) 15
12. 12.Which is closest to 3493 ÷ 51? (a) 700 (b) 70 (c) 35 (d) 140
13. 13.Which is closest to 1009 ÷ 51? (a) 200 (b) 10 (c) 20 (d) 40
14. 14.Which is closest to 1207 ÷ 29? (a) 40 (b) 20 (c) 400 (d) 80
15. 15.Which is closest to 504 × 20? (Round each number first.) (a) 20000 (b) 1000 (c) 10000 (d) 100000
16. 16.Which is closest to 902 × 69? (Round each number first.) (a) 630000 (b) 63000 (c) 126000 (d) 6300
17. 17.Which is closest to 702 + 101 + 703? (a) 1500 (b) 1700 (c) 1400 (d) 1600
18. 18.Which is closest to 202 + 305 + 502? (a) 1200 (b) 1100 (c) 900 (d) 1000
19. 19.Which is closest to 302 + 296 + 95? (a) 600 (b) 700 (c) 800 (d) 900
20. 20.Which is closest to 498 × 30? (Round each number first.) (a) 30000 (b) 15000 (c) 150000 (d) 1500
21. 21.Which is closest to 904 × 39? (Round each number first.) (a) 3600 (b) 72000 (c) 36000 (d) 360000
22. 22.Which is closest to 201 × 51? (Round each number first.) (a) 10000 (b) 100000 (c) 20000 (d) 1000
23. 23.Which is closest to 1508 ÷ 49? (a) 60 (b) 30 (c) 15 (d) 300
24. 24.Which is closest to 303 × 60? (Round each number first.) (a) 180000 (b) 18000 (c) 1800 (d) 36000
25. 25.Round 60.94 to one decimal place. =
26. 26.Round 92.64 to one decimal place. =
27. 27.Which is closest to 3198 ÷ 39? (a) 80 (b) 800 (c) 40 (d) 160
28. 28.Which is closest to 795 + 504 + 498? (a) 1800 (b) 2000 (c) 1700 (d) 1900
29. 29.Which is closest to 202 × 39? (Round each number first.) (a) 80000 (b) 16000 (c) 8000 (d) 800
30. 30.Which is closest to 204 + 701 + 300? (a) 1100 (b) 1300 (c) 1400 (d) 1200
31. 31.Which is closest to 100 + 897 + 96? (a) 1100 (b) 1200 (c) 1300 (d) 1000
32. 32.Which is closest to 297 + 96 + 105? (a) 400 (b) 500 (c) 700 (d) 600
33. 33.Round 13642 to the nearest ten.
34. 34.Which is closest to 102 + 200 + 896? (a) 1100 (b) 1300 (c) 1400 (d) 1200
35. 35.Round 6316 to the nearest hundred.
36. 36.Round 69.77 to one decimal place. =
37. 37.Which is closest to 3202 ÷ 41? (a) 160 (b) 40 (c) 800 (d) 80
38. 38.Which is closest to 300 + 302 + 398? (a) 900 (b) 1200 (c) 1000 (d) 1100
39. 39.Which is closest to 402 × 68? (Round each number first.) (a) 280000 (b) 28000 (c) 2800 (d) 56000
40. 40.Which is closest to 897 + 396 + 302? (a) 1600 (b) 1500 (c) 1800 (d) 1700

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