Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 223 · 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 196 + 400 + 796? (a) 1600 (b) 1400 (c) 1300 (d) 1500
2. 2.Which is closest to 601 + 298 + 96? (a) 900 (b) 1200 (c) 1000 (d) 1100
3. 3.Round 31434 to the nearest hundred.
4. 4.Which is closest to 403 × 30? (Round each number first.) (a) 120000 (b) 12000 (c) 24000 (d) 1200
5. 5.Round 27562 to the nearest ten.
6. 6.Round 95464 to the nearest hundred.
7. 7.Which is closest to 301 × 78? (Round each number first.) (a) 24000 (b) 48000 (c) 240000 (d) 2400
8. 8.Round 33755 to the nearest thousand.
9. 9.Round 65.13 to one decimal place. =
10. 10.Which is closest to 602 × 78? (Round each number first.) (a) 48000 (b) 4800 (c) 480000 (d) 96000
11. 11.Which is closest to 1499 ÷ 49? (a) 15 (b) 60 (c) 30 (d) 300
12. 12.Round 5533 to the nearest thousand.
13. 13.Round 33451 to the nearest hundred.
14. 14.Which is closest to 903 × 62? (Round each number first.) (a) 540000 (b) 54000 (c) 108000 (d) 5400
15. 15.Which is closest to 301 × 19? (Round each number first.) (a) 60000 (b) 6000 (c) 600 (d) 12000
16. 16.Round 11.69 to one decimal place. =
17. 17.Round 28933 to the nearest ten.
18. 18.Round 23201 to the nearest hundred.
19. 19.Round 73.08 to one decimal place. =
20. 20.Which is closest to 304 × 28? (Round each number first.) (a) 18000 (b) 9000 (c) 900 (d) 90000
21. 21.Round 90.91 to one decimal place. =
22. 22.Which is closest to 1395 ÷ 21? (a) 700 (b) 35 (c) 140 (d) 70
23. 23.Which is closest to 199 × 51? (Round each number first.) (a) 20000 (b) 10000 (c) 100000 (d) 1000
24. 24.Round 14.59 to one decimal place. =
25. 25.Which is closest to 501 × 29? (Round each number first.) (a) 1500 (b) 15000 (c) 150000 (d) 30000
26. 26.Round 49.19 to one decimal place. =
27. 27.Round 64829 to the nearest thousand.
28. 28.Which is closest to 793 ÷ 41? (a) 10 (b) 200 (c) 20 (d) 40
29. 29.Which is closest to 403 + 496 + 199? (a) 1200 (b) 1300 (c) 1100 (d) 1000
30. 30.Which is closest to 304 × 29? (Round each number first.) (a) 18000 (b) 90000 (c) 9000 (d) 900
31. 31.Round 42795 to the nearest thousand.
32. 32.Round 14.51 to one decimal place. =
33. 33.Round 11.57 to one decimal place. =
34. 34.Which is closest to 302 + 404 + 897? (a) 1500 (b) 1700 (c) 1800 (d) 1600
35. 35.Round 29.58 to one decimal place. =
36. 36.Which is closest to 805 ÷ 41? (a) 40 (b) 20 (c) 200 (d) 10
37. 37.Which is closest to 897 + 98 + 396? (a) 1300 (b) 1600 (c) 1400 (d) 1500
38. 38.Which is closest to 797 × 82? (Round each number first.) (a) 64000 (b) 6400 (c) 640000 (d) 128000
39. 39.Which is closest to 596 × 58? (Round each number first.) (a) 3600 (b) 72000 (c) 36000 (d) 360000
40. 40.Round 67.08 to one decimal place. =

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