Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 337 · 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 296 × 88? (Round each number first.) (a) 27000 (b) 270000 (c) 2700 (d) 54000
2. 2.Which is closest to 404 × 88? (Round each number first.) (a) 72000 (b) 36000 (c) 360000 (d) 3600
3. 3.Which is closest to 303 × 22? (Round each number first.) (a) 600 (b) 60000 (c) 6000 (d) 12000
4. 4.Which is closest to 800 + 297 + 101? (a) 1300 (b) 1100 (c) 1400 (d) 1200
5. 5.Round 62411 to the nearest ten.
6. 6.Which is closest to 699 × 48? (Round each number first.) (a) 35000 (b) 70000 (c) 350000 (d) 3500
7. 7.Which is closest to 499 + 803 + 797? (a) 2200 (b) 2300 (c) 2100 (d) 2000
8. 8.Which is closest to 3001 ÷ 49? (a) 120 (b) 30 (c) 600 (d) 60
9. 9.Which is closest to 2797 ÷ 39? (a) 700 (b) 140 (c) 35 (d) 70
10. 10.Which is closest to 797 × 59? (Round each number first.) (a) 4800 (b) 48000 (c) 480000 (d) 96000
11. 11.Round 72468 to the nearest thousand.
12. 12.Which is closest to 101 + 603 + 405? (a) 1300 (b) 1100 (c) 1000 (d) 1200
13. 13.Which is closest to 596 × 18? (Round each number first.) (a) 120000 (b) 12000 (c) 1200 (d) 24000
14. 14.Round 29760 to the nearest hundred.
15. 15.Which is closest to 395 + 902 + 302? (a) 1700 (b) 1800 (c) 1500 (d) 1600
16. 16.Which is closest to 401 × 39? (Round each number first.) (a) 32000 (b) 1600 (c) 16000 (d) 160000
17. 17.Round 44428 to the nearest thousand.
18. 18.Round 45.12 to one decimal place. =
19. 19.Which is closest to 198 × 92? (Round each number first.) (a) 36000 (b) 180000 (c) 18000 (d) 1800
20. 20.Which is closest to 896 + 700 + 401? (a) 1900 (b) 2000 (c) 2200 (d) 2100
21. 21.Which is closest to 1400 ÷ 21? (a) 700 (b) 35 (c) 140 (d) 70
22. 22.Which is closest to 399 × 29? (Round each number first.) (a) 120000 (b) 1200 (c) 12000 (d) 24000
23. 23.Which is closest to 499 × 80? (Round each number first.) (a) 400000 (b) 40000 (c) 80000 (d) 4000
24. 24.Round 50.76 to one decimal place. =
25. 25.Which is closest to 796 + 95 + 396? (a) 1200 (b) 1400 (c) 1300 (d) 1500
26. 26.Round 20068 to the nearest ten.
27. 27.Round 99.53 to one decimal place. =
28. 28.Which is closest to 603 × 21? (Round each number first.) (a) 120000 (b) 12000 (c) 1200 (d) 24000
29. 29.Which is closest to 298 × 59? (Round each number first.) (a) 180000 (b) 36000 (c) 18000 (d) 1800
30. 30.Which is closest to 195 + 902 + 295? (a) 1600 (b) 1400 (c) 1500 (d) 1300
31. 31.Round 70369 to the nearest hundred.
32. 32.Which is closest to 898 × 61? (Round each number first.) (a) 540000 (b) 108000 (c) 54000 (d) 5400
33. 33.Which is closest to 400 + 203 + 599? (a) 1400 (b) 1100 (c) 1300 (d) 1200
34. 34.Which is closest to 1994 ÷ 41? (a) 50 (b) 100 (c) 500 (d) 25
35. 35.Round 11.23 to one decimal place. =
36. 36.Round 17.07 to one decimal place. =
37. 37.Which is closest to 705 + 804 + 497? (a) 2000 (b) 2100 (c) 2200 (d) 1900
38. 38.Round 34.83 to one decimal place. =
39. 39.Which is closest to 696 + 305 + 495? (a) 1500 (b) 1400 (c) 1600 (d) 1700
40. 40.Which is closest to 404 × 60? (Round each number first.) (a) 24000 (b) 48000 (c) 240000 (d) 2400

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