Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 194 · 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 20.53 to one decimal place. =
2. 2.Round 66737 to the nearest hundred.
3. 3.Which is closest to 97 + 300 + 198? (a) 700 (b) 500 (c) 600 (d) 800
4. 4.Which is closest to 991 ÷ 49? (a) 40 (b) 10 (c) 20 (d) 200
5. 5.Which is closest to 202 + 702 + 104? (a) 1100 (b) 900 (c) 1200 (d) 1000
6. 6.Which is closest to 395 ÷ 19? (a) 10 (b) 40 (c) 20 (d) 200
7. 7.Round 79.56 to one decimal place. =
8. 8.Which is closest to 904 × 41? (Round each number first.) (a) 72000 (b) 3600 (c) 36000 (d) 360000
9. 9.Round 76.59 to one decimal place. =
10. 10.Which is closest to 898 × 28? (Round each number first.) (a) 2700 (b) 54000 (c) 270000 (d) 27000
11. 11.Round 84.78 to one decimal place. =
12. 12.Which is closest to 295 + 397 + 895? (a) 1800 (b) 1600 (c) 1700 (d) 1500
13. 13.Which is closest to 102 + 601 + 95? (a) 700 (b) 800 (c) 900 (d) 1000
14. 14.Which is closest to 297 + 701 + 297? (a) 1200 (b) 1500 (c) 1400 (d) 1300
15. 15.Which is closest to 398 × 88? (Round each number first.) (a) 36000 (b) 72000 (c) 3600 (d) 360000
16. 16.Round 11.82 to one decimal place. =
17. 17.Which is closest to 597 × 52? (Round each number first.) (a) 3000 (b) 300000 (c) 30000 (d) 60000
18. 18.Which is closest to 905 ÷ 29? (a) 15 (b) 60 (c) 300 (d) 30
19. 19.Round 23432 to the nearest thousand.
20. 20.Round 10.13 to one decimal place. =
21. 21.Which is closest to 801 × 21? (Round each number first.) (a) 1600 (b) 32000 (c) 16000 (d) 160000
22. 22.Which is closest to 202 × 22? (Round each number first.) (a) 40000 (b) 8000 (c) 400 (d) 4000
23. 23.Which is closest to 700 + 101 + 701? (a) 1400 (b) 1700 (c) 1600 (d) 1500
24. 24.Which is closest to 701 × 42? (Round each number first.) (a) 28000 (b) 2800 (c) 280000 (d) 56000
25. 25.Which is closest to 96 + 499 + 400? (a) 1200 (b) 900 (c) 1100 (d) 1000
26. 26.Which is closest to 1500 ÷ 29? (a) 50 (b) 25 (c) 500 (d) 100
27. 27.Which is closest to 196 × 28? (Round each number first.) (a) 6000 (b) 60000 (c) 12000 (d) 600
28. 28.Which is closest to 2499 ÷ 51? (a) 25 (b) 100 (c) 50 (d) 500
29. 29.Round 76004 to the nearest thousand.
30. 30.Which is closest to 698 × 49? (Round each number first.) (a) 3500 (b) 35000 (c) 70000 (d) 350000
31. 31.Which is closest to 204 × 39? (Round each number first.) (a) 80000 (b) 800 (c) 16000 (d) 8000
32. 32.Round 99.06 to one decimal place. =
33. 33.Which is closest to 298 × 71? (Round each number first.) (a) 210000 (b) 21000 (c) 2100 (d) 42000
34. 34.Which is closest to 395 + 96 + 397? (a) 1000 (b) 1100 (c) 900 (d) 800
35. 35.Which is closest to 797 × 51? (Round each number first.) (a) 80000 (b) 40000 (c) 4000 (d) 400000
36. 36.Which is closest to 199 × 59? (Round each number first.) (a) 120000 (b) 1200 (c) 24000 (d) 12000
37. 37.Round 93467 to the nearest hundred.
38. 38.Which is closest to 196 × 59? (Round each number first.) (a) 12000 (b) 1200 (c) 120000 (d) 24000
39. 39.Which is closest to 403 + 498 + 698? (a) 1500 (b) 1700 (c) 1800 (d) 1600
40. 40.Which is closest to 205 + 198 + 200? (a) 700 (b) 500 (c) 600 (d) 800

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