Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 314 · 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 402 × 39? (Round each number first.) (a) 1600 (b) 16000 (c) 32000 (d) 160000
2. 2.Which is closest to 196 + 195 + 597? (a) 1000 (b) 1100 (c) 1200 (d) 900
3. 3.Which is closest to 602 + 101 + 901? (a) 1600 (b) 1700 (c) 1500 (d) 1800
4. 4.Which is closest to 603 + 904 + 703? (a) 2300 (b) 2100 (c) 2400 (d) 2200
5. 5.Which is closest to 1492 ÷ 51? (a) 60 (b) 30 (c) 15 (d) 300
6. 6.Round 90976 to the nearest hundred.
7. 7.Which is closest to 804 × 31? (Round each number first.) (a) 240000 (b) 24000 (c) 2400 (d) 48000
8. 8.Which is closest to 702 × 82? (Round each number first.) (a) 112000 (b) 560000 (c) 56000 (d) 5600
9. 9.Round 16.51 to one decimal place. =
10. 10.Round 18509 to the nearest thousand.
11. 11.Round 45.89 to one decimal place. =
12. 12.Round 34.84 to one decimal place. =
13. 13.Which is closest to 2697 ÷ 29? (a) 90 (b) 180 (c) 900 (d) 45
14. 14.Round 39.18 to one decimal place. =
15. 15.Which is closest to 498 × 38? (Round each number first.) (a) 2000 (b) 20000 (c) 200000 (d) 40000
16. 16.Round 51.82 to one decimal place. =
17. 17.Round 45393 to the nearest ten.
18. 18.Which is closest to 703 + 403 + 896? (a) 2200 (b) 2100 (c) 1900 (d) 2000
19. 19.Which is closest to 799 × 71? (Round each number first.) (a) 56000 (b) 5600 (c) 560000 (d) 112000
20. 20.Round 83239 to the nearest hundred.
21. 21.Which is closest to 304 × 72? (Round each number first.) (a) 2100 (b) 42000 (c) 21000 (d) 210000
22. 22.Round 10.22 to one decimal place. =
23. 23.Round 21.07 to one decimal place. =
24. 24.Round 60.17 to one decimal place. =
25. 25.Which is closest to 902 + 499 + 400? (a) 1900 (b) 2000 (c) 1700 (d) 1800
26. 26.Round 83.66 to one decimal place. =
27. 27.Which is closest to 198 × 40? (Round each number first.) (a) 80000 (b) 800 (c) 16000 (d) 8000
28. 28.Round 25707 to the nearest hundred.
29. 29.Round 27555 to the nearest thousand.
30. 30.Which is closest to 604 × 20? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
31. 31.Which is closest to 399 + 802 + 201? (a) 1600 (b) 1400 (c) 1500 (d) 1300
32. 32.Which is closest to 395 + 195 + 99? (a) 800 (b) 600 (c) 900 (d) 700
33. 33.Round 6123 to the nearest hundred.
34. 34.Round 50698 to the nearest hundred.
35. 35.Round 63015 to the nearest thousand.
36. 36.Round 13579 to the nearest hundred.
37. 37.Round 38399 to the nearest ten.
38. 38.Which is closest to 196 × 18? (Round each number first.) (a) 400 (b) 8000 (c) 4000 (d) 40000
39. 39.Which is closest to 696 × 41? (Round each number first.) (a) 28000 (b) 2800 (c) 56000 (d) 280000
40. 40.Round 86.76 to one decimal place. =

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