Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 759 · 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 305 + 398 + 900? (a) 1800 (b) 1700 (c) 1500 (d) 1600
2. 2.Round 93222 to the nearest hundred.
3. 3.Round 47.06 to one decimal place. =
4. 4.Round 58.13 to one decimal place. =
5. 5.Round 62.07 to one decimal place. =
6. 6.Which is closest to 195 + 200 + 696? (a) 1000 (b) 1100 (c) 1200 (d) 1300
7. 7.Round 90.09 to one decimal place. =
8. 8.Round 61.33 to one decimal place. =
9. 9.Round 10.74 to one decimal place. =
10. 10.Round 97.18 to one decimal place. =
11. 11.Which is closest to 897 × 68? (Round each number first.) (a) 63000 (b) 6300 (c) 630000 (d) 126000
12. 12.Which is closest to 1207 ÷ 21? (a) 600 (b) 30 (c) 60 (d) 120
13. 13.Which is closest to 698 × 41? (Round each number first.) (a) 280000 (b) 56000 (c) 28000 (d) 2800
14. 14.Which is closest to 299 + 298 + 405? (a) 1000 (b) 1200 (c) 1100 (d) 900
15. 15.Which is closest to 603 × 38? (Round each number first.) (a) 240000 (b) 2400 (c) 24000 (d) 48000
16. 16.Which is closest to 600 ÷ 21? (a) 15 (b) 60 (c) 300 (d) 30
17. 17.Round 42358 to the nearest thousand.
18. 18.Which is closest to 1204 ÷ 21? (a) 30 (b) 60 (c) 600 (d) 120
19. 19.Round 53966 to the nearest thousand.
20. 20.Round 10.53 to one decimal place. =
21. 21.Round 79.52 to one decimal place. =
22. 22.Round 74.58 to one decimal place. =
23. 23.Round 40.31 to one decimal place. =
24. 24.Round 16236 to the nearest thousand.
25. 25.Which is closest to 2803 ÷ 39? (a) 700 (b) 35 (c) 70 (d) 140
26. 26.Round 83491 to the nearest hundred.
27. 27.Which is closest to 400 + 299 + 100? (a) 1000 (b) 900 (c) 700 (d) 800
28. 28.Which is closest to 1801 ÷ 29? (a) 60 (b) 120 (c) 30 (d) 600
29. 29.Which is closest to 796 × 48? (Round each number first.) (a) 4000 (b) 40000 (c) 80000 (d) 400000
30. 30.Which is closest to 404 × 42? (Round each number first.) (a) 32000 (b) 16000 (c) 160000 (d) 1600
31. 31.Round 72707 to the nearest ten.
32. 32.Round 33112 to the nearest thousand.
33. 33.Round 66239 to the nearest hundred.
34. 34.Round 63166 to the nearest ten.
35. 35.Which is closest to 702 × 79? (Round each number first.) (a) 56000 (b) 560000 (c) 112000 (d) 5600
36. 36.Round 48.54 to one decimal place. =
37. 37.Which is closest to 901 × 42? (Round each number first.) (a) 360000 (b) 72000 (c) 3600 (d) 36000
38. 38.Which is closest to 591 ÷ 21? (a) 60 (b) 300 (c) 30 (d) 15
39. 39.Round 94433 to the nearest ten.
40. 40.Round 63663 to the nearest thousand.

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