Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 712 · 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.Round 29846 to the nearest ten.
2. 2.Which is closest to 1492 ÷ 51? (a) 30 (b) 15 (c) 300 (d) 60
3. 3.Round 23573 to the nearest hundred.
4. 4.Round 57.58 to one decimal place. =
5. 5.Round 17.39 to one decimal place. =
6. 6.Which is closest to 197 × 39? (Round each number first.) (a) 80000 (b) 800 (c) 16000 (d) 8000
7. 7.Which is closest to 200 + 797 + 801? (a) 1900 (b) 1800 (c) 2000 (d) 1700
8. 8.Round 12.78 to one decimal place. =
9. 9.Which is closest to 799 × 79? (Round each number first.) (a) 6400 (b) 128000 (c) 640000 (d) 64000
10. 10.Which is closest to 2808 ÷ 41? (a) 700 (b) 70 (c) 35 (d) 140
11. 11.Which is closest to 397 × 89? (Round each number first.) (a) 72000 (b) 360000 (c) 3600 (d) 36000
12. 12.Which is closest to 802 + 503 + 97? (a) 1400 (b) 1600 (c) 1500 (d) 1300
13. 13.Which is closest to 1201 ÷ 29? (a) 20 (b) 80 (c) 400 (d) 40
14. 14.Round 35.89 to one decimal place. =
15. 15.Which is closest to 404 × 50? (Round each number first.) (a) 40000 (b) 200000 (c) 2000 (d) 20000
16. 16.Which is closest to 1604 ÷ 39? (a) 80 (b) 400 (c) 20 (d) 40
17. 17.Which is closest to 698 × 40? (Round each number first.) (a) 28000 (b) 56000 (c) 2800 (d) 280000
18. 18.Which is closest to 803 ÷ 39? (a) 10 (b) 20 (c) 40 (d) 200
19. 19.Round 90003 to the nearest thousand.
20. 20.Which is closest to 803 × 32? (Round each number first.) (a) 2400 (b) 48000 (c) 24000 (d) 240000
21. 21.Which is closest to 204 × 60? (Round each number first.) (a) 24000 (b) 120000 (c) 1200 (d) 12000
22. 22.Which is closest to 605 + 797 + 302? (a) 1900 (b) 1800 (c) 1700 (d) 1600
23. 23.Round 53894 to the nearest ten.
24. 24.Round 92.91 to one decimal place. =
25. 25.Which is closest to 2009 ÷ 49? (a) 400 (b) 40 (c) 80 (d) 20
26. 26.Which is closest to 897 × 50? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
27. 27.Round 75783 to the nearest hundred.
28. 28.Which is closest to 895 + 801 + 502? (a) 2200 (b) 2400 (c) 2100 (d) 2300
29. 29.Which is closest to 400 × 61? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
30. 30.Which is closest to 2005 ÷ 49? (a) 400 (b) 80 (c) 40 (d) 20
31. 31.Which is closest to 399 + 98 + 300? (a) 1000 (b) 700 (c) 800 (d) 900
32. 32.Which is closest to 1203 ÷ 29? (a) 80 (b) 40 (c) 20 (d) 400
33. 33.Which is closest to 903 × 20? (Round each number first.) (a) 18000 (b) 1800 (c) 180000 (d) 36000
34. 34.Which is closest to 897 × 62? (Round each number first.) (a) 108000 (b) 5400 (c) 54000 (d) 540000
35. 35.Which is closest to 701 × 32? (Round each number first.) (a) 210000 (b) 42000 (c) 2100 (d) 21000
36. 36.Round 25065 to the nearest hundred.
37. 37.Which is closest to 2508 ÷ 51? (a) 25 (b) 500 (c) 100 (d) 50
38. 38.Which is closest to 396 × 91? (Round each number first.) (a) 3600 (b) 36000 (c) 72000 (d) 360000
39. 39.Which is closest to 201 + 499 + 196? (a) 1100 (b) 1000 (c) 900 (d) 800
40. 40.Which is closest to 403 + 905 + 500? (a) 1800 (b) 2000 (c) 1900 (d) 1700

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