Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 369 · 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.Round 28.37 to one decimal place. =
2. 2.Which is closest to 391 ÷ 19? (a) 10 (b) 20 (c) 200 (d) 40
3. 3.Which is closest to 503 + 902 + 395? (a) 1800 (b) 1700 (c) 1900 (d) 2000
4. 4.Which is closest to 397 ÷ 19? (a) 200 (b) 40 (c) 10 (d) 20
5. 5.Which is closest to 1495 ÷ 51? (a) 15 (b) 300 (c) 30 (d) 60
6. 6.Round 70.31 to one decimal place. =
7. 7.Which is closest to 298 × 70? (Round each number first.) (a) 42000 (b) 2100 (c) 210000 (d) 21000
8. 8.Round 30.87 to one decimal place. =
9. 9.Round 68928 to the nearest hundred.
10. 10.Which is closest to 902 + 802 + 898? (a) 2500 (b) 2800 (c) 2700 (d) 2600
11. 11.Which is closest to 802 × 32? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
12. 12.Which is closest to 197 × 18? (Round each number first.) (a) 400 (b) 4000 (c) 8000 (d) 40000
13. 13.Round 15.56 to one decimal place. =
14. 14.Which is closest to 1505 ÷ 49? (a) 30 (b) 15 (c) 60 (d) 300
15. 15.Which is closest to 303 × 18? (Round each number first.) (a) 6000 (b) 600 (c) 60000 (d) 12000
16. 16.Which is closest to 202 × 68? (Round each number first.) (a) 28000 (b) 1400 (c) 140000 (d) 14000
17. 17.Round 62446 to the nearest hundred.
18. 18.Which is closest to 900 ÷ 29? (a) 300 (b) 60 (c) 15 (d) 30
19. 19.Which is closest to 196 × 29? (Round each number first.) (a) 6000 (b) 60000 (c) 600 (d) 12000
20. 20.Which is closest to 300 + 99 + 595? (a) 1200 (b) 900 (c) 1100 (d) 1000
21. 21.Round 86818 to the nearest ten.
22. 22.Round 69878 to the nearest thousand.
23. 23.Which is closest to 295 + 802 + 301? (a) 1500 (b) 1600 (c) 1400 (d) 1300
24. 24.Which is closest to 398 × 91? (Round each number first.) (a) 3600 (b) 360000 (c) 36000 (d) 72000
25. 25.Which is closest to 801 × 88? (Round each number first.) (a) 72000 (b) 7200 (c) 144000 (d) 720000
26. 26.Which is closest to 602 + 904 + 795? (a) 2500 (b) 2300 (c) 2400 (d) 2200
27. 27.Which is closest to 297 × 60? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
28. 28.Which is closest to 695 + 99 + 95? (a) 1000 (b) 800 (c) 1100 (d) 900
29. 29.Which is closest to 896 ÷ 29? (a) 30 (b) 300 (c) 15 (d) 60
30. 30.Which is closest to 1492 ÷ 51? (a) 300 (b) 15 (c) 30 (d) 60
31. 31.Round 41766 to the nearest ten.
32. 32.Which is closest to 401 × 91? (Round each number first.) (a) 3600 (b) 360000 (c) 36000 (d) 72000
33. 33.Which is closest to 599 × 20? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
34. 34.Which is closest to 302 × 79? (Round each number first.) (a) 24000 (b) 48000 (c) 240000 (d) 2400
35. 35.Which is closest to 698 × 42? (Round each number first.) (a) 2800 (b) 28000 (c) 56000 (d) 280000
36. 36.Which is closest to 303 × 81? (Round each number first.) (a) 48000 (b) 240000 (c) 2400 (d) 24000
37. 37.Round 30.09 to one decimal place. =
38. 38.Which is closest to 103 + 595 + 299? (a) 900 (b) 1100 (c) 1200 (d) 1000
39. 39.Which is closest to 202 × 60? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
40. 40.Round 59.79 to one decimal place. =

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