Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 76 · 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 902 × 70? (Round each number first.) (a) 630000 (b) 6300 (c) 126000 (d) 63000
2. 2.Which is closest to 397 + 701 + 796? (a) 1900 (b) 2100 (c) 2000 (d) 1800
3. 3.Which is closest to 1201 ÷ 21? (a) 30 (b) 60 (c) 120 (d) 600
4. 4.Which is closest to 304 × 28? (Round each number first.) (a) 18000 (b) 9000 (c) 90000 (d) 900
5. 5.Round 10.48 to one decimal place. =
6. 6.Round 28739 to the nearest thousand.
7. 7.Which is closest to 897 × 90? (Round each number first.) (a) 162000 (b) 81000 (c) 810000 (d) 8100
8. 8.Which is closest to 296 × 69? (Round each number first.) (a) 2100 (b) 42000 (c) 210000 (d) 21000
9. 9.Which is closest to 600 × 39? (Round each number first.) (a) 48000 (b) 2400 (c) 24000 (d) 240000
10. 10.Which is closest to 595 ÷ 21? (a) 60 (b) 30 (c) 300 (d) 15
11. 11.Round 20420 to the nearest thousand.
12. 12.Round 83.06 to one decimal place. =
13. 13.Which is closest to 602 ÷ 19? (a) 30 (b) 15 (c) 60 (d) 300
14. 14.Which is closest to 805 ÷ 41? (a) 40 (b) 10 (c) 200 (d) 20
15. 15.Which is closest to 998 ÷ 49? (a) 40 (b) 20 (c) 200 (d) 10
16. 16.Which is closest to 1607 ÷ 41? (a) 20 (b) 400 (c) 40 (d) 80
17. 17.Which is closest to 697 × 31? (Round each number first.) (a) 2100 (b) 42000 (c) 21000 (d) 210000
18. 18.Round 90004 to the nearest thousand.
19. 19.Round 76.36 to one decimal place. =
20. 20.Round 75651 to the nearest thousand.
21. 21.Which is closest to 598 ÷ 29? (a) 20 (b) 10 (c) 200 (d) 40
22. 22.Which is closest to 604 + 103 + 304? (a) 1000 (b) 1200 (c) 1100 (d) 900
23. 23.Which is closest to 598 × 19? (Round each number first.) (a) 12000 (b) 24000 (c) 120000 (d) 1200
24. 24.Which is closest to 203 × 68? (Round each number first.) (a) 28000 (b) 14000 (c) 1400 (d) 140000
25. 25.Which is closest to 404 ÷ 21? (a) 200 (b) 40 (c) 20 (d) 10
26. 26.Round 27.32 to one decimal place. =
27. 27.Which is closest to 1794 ÷ 21? (a) 45 (b) 90 (c) 180 (d) 900
28. 28.Which is closest to 2808 ÷ 41? (a) 700 (b) 140 (c) 35 (d) 70
29. 29.Round 95410 to the nearest thousand.
30. 30.Round 11054 to the nearest ten.
31. 31.Which is closest to 904 × 62? (Round each number first.) (a) 5400 (b) 54000 (c) 540000 (d) 108000
32. 32.Which is closest to 301 × 28? (Round each number first.) (a) 18000 (b) 90000 (c) 9000 (d) 900
33. 33.Which is closest to 701 + 395 + 704? (a) 1900 (b) 1800 (c) 2000 (d) 1700
34. 34.Which is closest to 602 × 51? (Round each number first.) (a) 30000 (b) 300000 (c) 3000 (d) 60000
35. 35.Which is closest to 202 × 22? (Round each number first.) (a) 4000 (b) 40000 (c) 400 (d) 8000
36. 36.Round 12852 to the nearest hundred.
37. 37.Which is closest to 898 × 49? (Round each number first.) (a) 450000 (b) 45000 (c) 4500 (d) 90000
38. 38.Which is closest to 799 × 60? (Round each number first.) (a) 480000 (b) 4800 (c) 96000 (d) 48000
39. 39.Which is closest to 496 × 78? (Round each number first.) (a) 80000 (b) 400000 (c) 40000 (d) 4000
40. 40.Which is closest to 2798 ÷ 41? (a) 140 (b) 70 (c) 700 (d) 35

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