Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 779 · 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 2397 ÷ 29? (a) 80 (b) 40 (c) 160 (d) 800
2. 2.Round 79.43 to one decimal place. =
3. 3.Round 66.61 to one decimal place. =
4. 4.Round 95596 to the nearest thousand.
5. 5.Round 13591 to the nearest thousand.
6. 6.Which is closest to 398 × 59? (Round each number first.) (a) 2400 (b) 48000 (c) 240000 (d) 24000
7. 7.Round 99176 to the nearest hundred.
8. 8.Round 94.17 to one decimal place. =
9. 9.Which is closest to 800 × 51? (Round each number first.) (a) 40000 (b) 400000 (c) 4000 (d) 80000
10. 10.Which is closest to 904 + 295 + 400? (a) 1700 (b) 1500 (c) 1600 (d) 1800
11. 11.Round 62.27 to one decimal place. =
12. 12.Round 44604 to the nearest thousand.
13. 13.Which is closest to 703 + 195 + 395? (a) 1200 (b) 1300 (c) 1500 (d) 1400
14. 14.Which is closest to 299 × 81? (Round each number first.) (a) 2400 (b) 240000 (c) 48000 (d) 24000
15. 15.Which is closest to 398 × 71? (Round each number first.) (a) 2800 (b) 56000 (c) 280000 (d) 28000
16. 16.Which is closest to 1791 ÷ 19? (a) 900 (b) 45 (c) 90 (d) 180
17. 17.Round 22.21 to one decimal place. =
18. 18.Which is closest to 95 + 104 + 395? (a) 500 (b) 800 (c) 700 (d) 600
19. 19.Which is closest to 501 + 504 + 102? (a) 1300 (b) 1100 (c) 1000 (d) 1200
20. 20.Which is closest to 500 + 802 + 302? (a) 1700 (b) 1600 (c) 1500 (d) 1800
21. 21.Round 52190 to the nearest thousand.
22. 22.Which is closest to 699 + 898 + 304? (a) 1900 (b) 2100 (c) 1800 (d) 2000
23. 23.Which is closest to 402 × 19? (Round each number first.) (a) 16000 (b) 8000 (c) 80000 (d) 800
24. 24.Round 49002 to the nearest thousand.
25. 25.Round 84.61 to one decimal place. =
26. 26.Which is closest to 801 + 299 + 597? (a) 1800 (b) 1900 (c) 1700 (d) 1600
27. 27.Round 2399 to the nearest hundred.
28. 28.Which is closest to 801 × 72? (Round each number first.) (a) 112000 (b) 5600 (c) 560000 (d) 56000
29. 29.Which is closest to 96 + 895 + 597? (a) 1700 (b) 1600 (c) 1500 (d) 1800
30. 30.Round 26.94 to one decimal place. =
31. 31.Round 63211 to the nearest hundred.
32. 32.Which is closest to 499 + 205 + 102? (a) 700 (b) 1000 (c) 800 (d) 900
33. 33.Round 3109 to the nearest thousand.
34. 34.Which is closest to 303 + 96 + 298? (a) 900 (b) 600 (c) 800 (d) 700
35. 35.Which is closest to 697 × 90? (Round each number first.) (a) 63000 (b) 630000 (c) 6300 (d) 126000
36. 36.Round 22.22 to one decimal place. =
37. 37.Round 73.87 to one decimal place. =
38. 38.Round 96.24 to one decimal place. =
39. 39.Round 50.62 to one decimal place. =
40. 40.Which is closest to 796 × 70? (Round each number first.) (a) 560000 (b) 56000 (c) 112000 (d) 5600

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