Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 977 · 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 1595 ÷ 21? (a) 160 (b) 800 (c) 40 (d) 80
2. 2.Which is closest to 299 + 796 + 796? (a) 2000 (b) 1800 (c) 2100 (d) 1900
3. 3.Which is closest to 500 × 61? (Round each number first.) (a) 3000 (b) 30000 (c) 300000 (d) 60000
4. 4.Round 99097 to the nearest hundred.
5. 5.Which is closest to 801 × 32? (Round each number first.) (a) 240000 (b) 48000 (c) 24000 (d) 2400
6. 6.Which is closest to 398 × 38? (Round each number first.) (a) 32000 (b) 1600 (c) 160000 (d) 16000
7. 7.Which is closest to 303 × 58? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
8. 8.Which is closest to 500 × 72? (Round each number first.) (a) 35000 (b) 70000 (c) 350000 (d) 3500
9. 9.Round 76.17 to one decimal place. =
10. 10.Which is closest to 100 + 700 + 95? (a) 1000 (b) 800 (c) 1100 (d) 900
11. 11.Round 50.54 to one decimal place. =
12. 12.Which is closest to 891 ÷ 29? (a) 60 (b) 300 (c) 15 (d) 30
13. 13.Which is closest to 603 ÷ 29? (a) 20 (b) 200 (c) 40 (d) 10
14. 14.Which is closest to 295 + 900 + 396? (a) 1700 (b) 1800 (c) 1500 (d) 1600
15. 15.Which is closest to 304 × 60? (Round each number first.) (a) 1800 (b) 36000 (c) 18000 (d) 180000
16. 16.Round 65437 to the nearest ten.
17. 17.Round 56664 to the nearest thousand.
18. 18.Round 25262 to the nearest ten.
19. 19.Which is closest to 596 × 62? (Round each number first.) (a) 3600 (b) 72000 (c) 36000 (d) 360000
20. 20.Which is closest to 298 × 78? (Round each number first.) (a) 24000 (b) 240000 (c) 48000 (d) 2400
21. 21.Which is closest to 700 + 300 + 904? (a) 2100 (b) 1900 (c) 2000 (d) 1800
22. 22.Round 55815 to the nearest thousand.
23. 23.Which is closest to 2805 ÷ 41? (a) 35 (b) 140 (c) 70 (d) 700
24. 24.Which is closest to 704 × 69? (Round each number first.) (a) 49000 (b) 490000 (c) 4900 (d) 98000
25. 25.Which is closest to 295 + 297 + 400? (a) 1100 (b) 900 (c) 1000 (d) 1200
26. 26.Which is closest to 904 × 49? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
27. 27.Which is closest to 797 + 104 + 101? (a) 1200 (b) 1000 (c) 1100 (d) 900
28. 28.Which is closest to 4005 ÷ 49? (a) 160 (b) 40 (c) 800 (d) 80
29. 29.Which is closest to 204 × 79? (Round each number first.) (a) 16000 (b) 1600 (c) 32000 (d) 160000
30. 30.Which is closest to 4494 ÷ 51? (a) 45 (b) 90 (c) 900 (d) 180
31. 31.Which is closest to 702 + 899 + 403? (a) 1900 (b) 2000 (c) 2100 (d) 2200
32. 32.Which is closest to 402 + 204 + 602? (a) 1300 (b) 1100 (c) 1400 (d) 1200
33. 33.Which is closest to 400 × 72? (Round each number first.) (a) 56000 (b) 2800 (c) 28000 (d) 280000
34. 34.Which is closest to 496 + 805 + 600? (a) 1900 (b) 2100 (c) 1800 (d) 2000
35. 35.Which is closest to 296 × 80? (Round each number first.) (a) 2400 (b) 24000 (c) 48000 (d) 240000
36. 36.Which is closest to 601 × 42? (Round each number first.) (a) 24000 (b) 48000 (c) 240000 (d) 2400
37. 37.Round 26063 to the nearest thousand.
38. 38.Which is closest to 1209 ÷ 29? (a) 40 (b) 20 (c) 80 (d) 400
39. 39.Round 73124 to the nearest ten.
40. 40.Round 81288 to the nearest thousand.

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