Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 923 · 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.Which is closest to 99 + 95 + 99? (a) 300 (b) 400 (c) 200 (d) 500
2. 2.Which is closest to 695 + 697 + 696? (a) 2200 (b) 2100 (c) 2300 (d) 2000
3. 3.Round 43.94 to one decimal place. =
4. 4.Round 13207 to the nearest thousand.
5. 5.Round 66.78 to one decimal place. =
6. 6.Round 42787 to the nearest thousand.
7. 7.Which is closest to 902 × 70? (Round each number first.) (a) 63000 (b) 6300 (c) 630000 (d) 126000
8. 8.Round 61056 to the nearest ten.
9. 9.Round 31281 to the nearest thousand.
10. 10.Round 70842 to the nearest thousand.
11. 11.Round 49209 to the nearest thousand.
12. 12.Which is closest to 205 + 297 + 798? (a) 1500 (b) 1200 (c) 1300 (d) 1400
13. 13.Round 46472 to the nearest hundred.
14. 14.Round 99551 to the nearest ten.
15. 15.Round 43165 to the nearest thousand.
16. 16.Round 63.13 to one decimal place. =
17. 17.Round 49.21 to one decimal place. =
18. 18.Which is closest to 804 ÷ 39? (a) 40 (b) 200 (c) 10 (d) 20
19. 19.Round 30.64 to one decimal place. =
20. 20.Round 17.56 to one decimal place. =
21. 21.Which is closest to 897 × 89? (Round each number first.) (a) 810000 (b) 81000 (c) 162000 (d) 8100
22. 22.Which is closest to 904 + 301 + 202? (a) 1500 (b) 1400 (c) 1600 (d) 1300
23. 23.Which is closest to 303 × 18? (Round each number first.) (a) 12000 (b) 6000 (c) 600 (d) 60000
24. 24.Round 91.93 to one decimal place. =
25. 25.Round 39.07 to one decimal place. =
26. 26.Which is closest to 396 × 70? (Round each number first.) (a) 280000 (b) 2800 (c) 28000 (d) 56000
27. 27.Which is closest to 201 + 902 + 103? (a) 1300 (b) 1200 (c) 1100 (d) 1400
28. 28.Which is closest to 201 + 798 + 304? (a) 1300 (b) 1500 (c) 1200 (d) 1400
29. 29.Which is closest to 904 × 60? (Round each number first.) (a) 54000 (b) 5400 (c) 108000 (d) 540000
30. 30.Which is closest to 296 × 52? (Round each number first.) (a) 30000 (b) 150000 (c) 15000 (d) 1500
31. 31.Round 74.38 to one decimal place. =
32. 32.Round 16863 to the nearest hundred.
33. 33.Which is closest to 4497 ÷ 51? (a) 180 (b) 90 (c) 45 (d) 900
34. 34.Which is closest to 4495 ÷ 49? (a) 45 (b) 90 (c) 900 (d) 180
35. 35.Round 19966 to the nearest ten.
36. 36.Round 16912 to the nearest thousand.
37. 37.Which is closest to 2006 ÷ 39? (a) 50 (b) 25 (c) 100 (d) 500
38. 38.Round 88191 to the nearest ten.
39. 39.Which is closest to 700 × 62? (Round each number first.) (a) 420000 (b) 42000 (c) 84000 (d) 4200
40. 40.Which is closest to 897 ÷ 29? (a) 15 (b) 30 (c) 60 (d) 300

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