Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 482 · 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 400 + 897 + 98? (a) 1400 (b) 1600 (c) 1500 (d) 1300
2. 2.Which is closest to 796 × 52? (Round each number first.) (a) 40000 (b) 4000 (c) 400000 (d) 80000
3. 3.Round 65.08 to one decimal place. =
4. 4.Which is closest to 597 × 40? (Round each number first.) (a) 48000 (b) 240000 (c) 24000 (d) 2400
5. 5.Which is closest to 297 × 92? (Round each number first.) (a) 2700 (b) 270000 (c) 54000 (d) 27000
6. 6.Which is closest to 1993 ÷ 41? (a) 50 (b) 100 (c) 25 (d) 500
7. 7.Which is closest to 3604 ÷ 41? (a) 900 (b) 180 (c) 90 (d) 45
8. 8.Round 29657 to the nearest hundred.
9. 9.Which is closest to 903 × 91? (Round each number first.) (a) 810000 (b) 8100 (c) 162000 (d) 81000
10. 10.Which is closest to 2393 ÷ 41? (a) 30 (b) 600 (c) 60 (d) 120
11. 11.Which is closest to 903 + 897 + 395? (a) 2300 (b) 2200 (c) 2100 (d) 2400
12. 12.Which is closest to 799 + 202 + 103? (a) 1100 (b) 1200 (c) 1000 (d) 1300
13. 13.Which is closest to 4007 ÷ 49? (a) 160 (b) 40 (c) 800 (d) 80
14. 14.Which is closest to 598 ÷ 19? (a) 15 (b) 300 (c) 60 (d) 30
15. 15.Which is closest to 397 × 31? (Round each number first.) (a) 12000 (b) 120000 (c) 1200 (d) 24000
16. 16.Which is closest to 909 ÷ 29? (a) 30 (b) 60 (c) 300 (d) 15
17. 17.Which is closest to 296 × 30? (Round each number first.) (a) 9000 (b) 900 (c) 18000 (d) 90000
18. 18.Which is closest to 503 × 59? (Round each number first.) (a) 30000 (b) 300000 (c) 60000 (d) 3000
19. 19.Round 98273 to the nearest ten.
20. 20.Round 14.23 to one decimal place. =
21. 21.Which is closest to 395 + 305 + 202? (a) 1000 (b) 800 (c) 1100 (d) 900
22. 22.Which is closest to 801 × 51? (Round each number first.) (a) 40000 (b) 4000 (c) 80000 (d) 400000
23. 23.Round 60.47 to one decimal place. =
24. 24.Which is closest to 2704 ÷ 29? (a) 900 (b) 90 (c) 180 (d) 45
25. 25.Which is closest to 599 + 605 + 203? (a) 1600 (b) 1500 (c) 1400 (d) 1300
26. 26.Round 85976 to the nearest hundred.
27. 27.Which is closest to 296 × 40? (Round each number first.) (a) 12000 (b) 1200 (c) 24000 (d) 120000
28. 28.Which is closest to 497 × 72? (Round each number first.) (a) 70000 (b) 3500 (c) 350000 (d) 35000
29. 29.Round 70.83 to one decimal place. =
30. 30.Which is closest to 897 + 398 + 798? (a) 2200 (b) 2300 (c) 2000 (d) 2100
31. 31.Which is closest to 503 + 803 + 98? (a) 1600 (b) 1500 (c) 1300 (d) 1400
32. 32.Which is closest to 396 × 48? (Round each number first.) (a) 2000 (b) 200000 (c) 20000 (d) 40000
33. 33.Which is closest to 602 ÷ 31? (a) 40 (b) 10 (c) 20 (d) 200
34. 34.Which is closest to 295 + 699 + 500? (a) 1600 (b) 1500 (c) 1700 (d) 1400
35. 35.Which is closest to 900 × 32? (Round each number first.) (a) 270000 (b) 2700 (c) 54000 (d) 27000
36. 36.Which is closest to 897 + 800 + 103? (a) 1900 (b) 2000 (c) 1800 (d) 1700
37. 37.Which is closest to 198 × 61? (Round each number first.) (a) 1200 (b) 12000 (c) 24000 (d) 120000
38. 38.Which is closest to 696 + 795 + 596? (a) 2100 (b) 2000 (c) 2300 (d) 2200
39. 39.Round 40.59 to one decimal place. =
40. 40.Round 37.36 to one decimal place. =

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