Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 835 · 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 2005 ÷ 39? (a) 25 (b) 500 (c) 50 (d) 100
2. 2.Round 71.37 to one decimal place. =
3. 3.Round 97.51 to one decimal place. =
4. 4.Which is closest to 496 × 49? (Round each number first.) (a) 25000 (b) 250000 (c) 50000 (d) 2500
5. 5.Round 4256 to the nearest hundred.
6. 6.Round 13.57 to one decimal place. =
7. 7.Round 98204 to the nearest ten.
8. 8.Which is closest to 899 × 29? (Round each number first.) (a) 270000 (b) 27000 (c) 2700 (d) 54000
9. 9.Round 29288 to the nearest thousand.
10. 10.Which is closest to 802 × 31? (Round each number first.) (a) 24000 (b) 240000 (c) 2400 (d) 48000
11. 11.Which is closest to 703 × 82? (Round each number first.) (a) 56000 (b) 5600 (c) 560000 (d) 112000
12. 12.Which is closest to 904 × 68? (Round each number first.) (a) 63000 (b) 126000 (c) 6300 (d) 630000
13. 13.Which is closest to 205 + 905 + 501? (a) 1600 (b) 1700 (c) 1800 (d) 1500
14. 14.Round 61049 to the nearest thousand.
15. 15.Which is closest to 2809 ÷ 39? (a) 70 (b) 140 (c) 700 (d) 35
16. 16.Which is closest to 503 + 395 + 98? (a) 1100 (b) 900 (c) 1200 (d) 1000
17. 17.Which is closest to 601 ÷ 21? (a) 60 (b) 15 (c) 30 (d) 300
18. 18.Which is closest to 904 × 18? (Round each number first.) (a) 1800 (b) 180000 (c) 36000 (d) 18000
19. 19.Which is closest to 599 × 91? (Round each number first.) (a) 5400 (b) 54000 (c) 108000 (d) 540000
20. 20.Round 66893 to the nearest ten.
21. 21.Which is closest to 396 × 38? (Round each number first.) (a) 32000 (b) 1600 (c) 16000 (d) 160000
22. 22.Round 71176 to the nearest ten.
23. 23.Round 16.11 to one decimal place. =
24. 24.Which is closest to 898 × 48? (Round each number first.) (a) 450000 (b) 45000 (c) 4500 (d) 90000
25. 25.Which is closest to 503 + 597 + 795? (a) 2000 (b) 1900 (c) 2100 (d) 1800
26. 26.Which is closest to 404 + 697 + 804? (a) 1800 (b) 1900 (c) 2100 (d) 2000
27. 27.Round 32.57 to one decimal place. =
28. 28.Round 78839 to the nearest thousand.
29. 29.Which is closest to 805 + 298 + 802? (a) 1900 (b) 1800 (c) 2100 (d) 2000
30. 30.Which is closest to 3596 ÷ 39? (a) 45 (b) 900 (c) 90 (d) 180
31. 31.Which is closest to 300 + 204 + 700? (a) 1400 (b) 1100 (c) 1200 (d) 1300
32. 32.Which is closest to 201 × 60? (Round each number first.) (a) 24000 (b) 1200 (c) 120000 (d) 12000
33. 33.Which is closest to 296 + 899 + 504? (a) 1700 (b) 1800 (c) 1600 (d) 1900
34. 34.Which is closest to 802 × 92? (Round each number first.) (a) 144000 (b) 7200 (c) 72000 (d) 720000
35. 35.Which is closest to 502 + 502 + 401? (a) 1600 (b) 1400 (c) 1500 (d) 1300
36. 36.Round 71.21 to one decimal place. =
37. 37.Which is closest to 505 + 905 + 803? (a) 2100 (b) 2200 (c) 2300 (d) 2400
38. 38.Which is closest to 898 × 20? (Round each number first.) (a) 18000 (b) 1800 (c) 180000 (d) 36000
39. 39.Which is closest to 793 ÷ 19? (a) 400 (b) 80 (c) 20 (d) 40
40. 40.Which is closest to 796 × 19? (Round each number first.) (a) 16000 (b) 160000 (c) 1600 (d) 32000

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