Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 789 · 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 793 ÷ 19? (a) 40 (b) 20 (c) 400 (d) 80
2. 2.Which is closest to 2001 ÷ 39? (a) 500 (b) 25 (c) 50 (d) 100
3. 3.Which is closest to 1202 ÷ 19? (a) 120 (b) 600 (c) 60 (d) 30
4. 4.Which is closest to 200 + 495 + 795? (a) 1400 (b) 1600 (c) 1500 (d) 1700
5. 5.Which is closest to 1196 ÷ 21? (a) 60 (b) 30 (c) 120 (d) 600
6. 6.Round 70.52 to one decimal place. =
7. 7.Which is closest to 501 × 58? (Round each number first.) (a) 300000 (b) 60000 (c) 3000 (d) 30000
8. 8.Round 27261 to the nearest ten.
9. 9.Round 75.41 to one decimal place. =
10. 10.Which is closest to 399 × 32? (Round each number first.) (a) 12000 (b) 24000 (c) 1200 (d) 120000
11. 11.Round 92.88 to one decimal place. =
12. 12.Which is closest to 697 × 88? (Round each number first.) (a) 6300 (b) 126000 (c) 630000 (d) 63000
13. 13.Which is closest to 700 + 505 + 600? (a) 1800 (b) 2000 (c) 1700 (d) 1900
14. 14.Which is closest to 701 × 88? (Round each number first.) (a) 63000 (b) 126000 (c) 6300 (d) 630000
15. 15.Which is closest to 498 + 401 + 901? (a) 1700 (b) 1900 (c) 2000 (d) 1800
16. 16.Round 29.73 to one decimal place. =
17. 17.Round 68.66 to one decimal place. =
18. 18.Which is closest to 1497 ÷ 49? (a) 300 (b) 30 (c) 60 (d) 15
19. 19.Round 88.13 to one decimal place. =
20. 20.Round 18951 to the nearest ten.
21. 21.Round 30005 to the nearest hundred.
22. 22.Round 19682 to the nearest hundred.
23. 23.Round 42403 to the nearest hundred.
24. 24.Round 41319 to the nearest ten.
25. 25.Round 10.49 to one decimal place. =
26. 26.Round 22.38 to one decimal place. =
27. 27.Which is closest to 404 × 62? (Round each number first.) (a) 240000 (b) 24000 (c) 48000 (d) 2400
28. 28.Round 53699 to the nearest ten.
29. 29.Round 59.18 to one decimal place. =
30. 30.Which is closest to 397 + 295 + 304? (a) 1100 (b) 1200 (c) 900 (d) 1000
31. 31.Round 42540 to the nearest thousand.
32. 32.Which is closest to 898 + 195 + 496? (a) 1800 (b) 1600 (c) 1700 (d) 1500
33. 33.Round 53720 to the nearest thousand.
34. 34.Which is closest to 807 ÷ 39? (a) 200 (b) 20 (c) 10 (d) 40
35. 35.Round 88.63 to one decimal place. =
36. 36.Which is closest to 601 + 302 + 801? (a) 1800 (b) 1600 (c) 1900 (d) 1700
37. 37.Which is closest to 496 × 41? (Round each number first.) (a) 40000 (b) 2000 (c) 200000 (d) 20000
38. 38.Which is closest to 503 + 204 + 299? (a) 900 (b) 1200 (c) 1100 (d) 1000
39. 39.Which is closest to 295 + 895 + 203? (a) 1600 (b) 1400 (c) 1500 (d) 1300
40. 40.Which is closest to 498 × 80? (Round each number first.) (a) 4000 (b) 80000 (c) 400000 (d) 40000

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