Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 660 · 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 3204 ÷ 39? (a) 800 (b) 80 (c) 160 (d) 40
2. 2.Which is closest to 297 × 88? (Round each number first.) (a) 54000 (b) 2700 (c) 270000 (d) 27000
3. 3.Which is closest to 400 × 92? (Round each number first.) (a) 72000 (b) 3600 (c) 360000 (d) 36000
4. 4.Round 11937 to the nearest hundred.
5. 5.Which is closest to 396 × 81? (Round each number first.) (a) 32000 (b) 3200 (c) 64000 (d) 320000
6. 6.Round 66216 to the nearest ten.
7. 7.Which is closest to 1801 ÷ 19? (a) 45 (b) 900 (c) 180 (d) 90
8. 8.Round 55963 to the nearest thousand.
9. 9.Round 10.73 to one decimal place. =
10. 10.Round 62360 to the nearest hundred.
11. 11.Round 93.27 to one decimal place. =
12. 12.Round 19.59 to one decimal place. =
13. 13.Round 34120 to the nearest thousand.
14. 14.Which is closest to 1495 ÷ 51? (a) 300 (b) 30 (c) 60 (d) 15
15. 15.Round 66312 to the nearest ten.
16. 16.Round 54059 to the nearest thousand.
17. 17.Which is closest to 600 × 31? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
18. 18.Round 18966 to the nearest ten.
19. 19.Which is closest to 604 + 398 + 800? (a) 2000 (b) 1800 (c) 1700 (d) 1900
20. 20.Round 95.58 to one decimal place. =
21. 21.Round 50228 to the nearest ten.
22. 22.Round 32.06 to one decimal place. =
23. 23.Round 82.32 to one decimal place. =
24. 24.Which is closest to 603 ÷ 29? (a) 20 (b) 10 (c) 40 (d) 200
25. 25.Which is closest to 599 + 904 + 504? (a) 2100 (b) 2200 (c) 1900 (d) 2000
26. 26.Which is closest to 196 × 72? (Round each number first.) (a) 28000 (b) 140000 (c) 14000 (d) 1400
27. 27.Round 75445 to the nearest thousand.
28. 28.Which is closest to 198 + 405 + 205? (a) 900 (b) 1000 (c) 700 (d) 800
29. 29.Which is closest to 202 + 395 + 198? (a) 700 (b) 1000 (c) 900 (d) 800
30. 30.Round 13222 to the nearest thousand.
31. 31.Which is closest to 698 × 28? (Round each number first.) (a) 2100 (b) 42000 (c) 210000 (d) 21000
32. 32.Round 49754 to the nearest hundred.
33. 33.Which is closest to 703 × 19? (Round each number first.) (a) 140000 (b) 1400 (c) 28000 (d) 14000
34. 34.Round 27154 to the nearest thousand.
35. 35.Which is closest to 697 × 18? (Round each number first.) (a) 140000 (b) 28000 (c) 14000 (d) 1400
36. 36.Which is closest to 299 × 92? (Round each number first.) (a) 27000 (b) 2700 (c) 54000 (d) 270000
37. 37.Round 74.41 to one decimal place. =
38. 38.Which is closest to 803 + 905 + 896? (a) 2800 (b) 2600 (c) 2700 (d) 2500
39. 39.Which is closest to 298 × 91? (Round each number first.) (a) 54000 (b) 2700 (c) 270000 (d) 27000
40. 40.Which is closest to 302 × 18? (Round each number first.) (a) 6000 (b) 600 (c) 60000 (d) 12000

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