Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 68 · 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 298 × 29? (Round each number first.) (a) 9000 (b) 90000 (c) 900 (d) 18000
2. 2.Which is closest to 697 × 19? (Round each number first.) (a) 14000 (b) 140000 (c) 28000 (d) 1400
3. 3.Which is closest to 2497 ÷ 49? (a) 500 (b) 25 (c) 100 (d) 50
4. 4.Round 44.07 to one decimal place. =
5. 5.Round 52170 to the nearest thousand.
6. 6.Which is closest to 592 ÷ 31? (a) 40 (b) 20 (c) 200 (d) 10
7. 7.Which is closest to 300 + 904 + 695? (a) 2100 (b) 2000 (c) 1800 (d) 1900
8. 8.Which is closest to 802 × 68? (Round each number first.) (a) 560000 (b) 5600 (c) 56000 (d) 112000
9. 9.Which is closest to 601 × 78? (Round each number first.) (a) 96000 (b) 480000 (c) 48000 (d) 4800
10. 10.Which is closest to 797 + 303 + 397? (a) 1600 (b) 1500 (c) 1400 (d) 1700
11. 11.Which is closest to 801 × 88? (Round each number first.) (a) 144000 (b) 720000 (c) 7200 (d) 72000
12. 12.Round 43694 to the nearest thousand.
13. 13.Which is closest to 302 × 32? (Round each number first.) (a) 90000 (b) 18000 (c) 900 (d) 9000
14. 14.Round 40957 to the nearest ten.
15. 15.Round 62.87 to one decimal place. =
16. 16.Which is closest to 797 × 68? (Round each number first.) (a) 56000 (b) 560000 (c) 112000 (d) 5600
17. 17.Which is closest to 3504 ÷ 51? (a) 35 (b) 70 (c) 700 (d) 140
18. 18.Which is closest to 1000 ÷ 49? (a) 40 (b) 20 (c) 10 (d) 200
19. 19.Round 19.46 to one decimal place. =
20. 20.Which is closest to 97 + 604 + 204? (a) 800 (b) 1000 (c) 900 (d) 1100
21. 21.Which is closest to 701 × 39? (Round each number first.) (a) 280000 (b) 2800 (c) 56000 (d) 28000
22. 22.Round 96976 to the nearest hundred.
23. 23.Which is closest to 902 + 395 + 596? (a) 2000 (b) 1800 (c) 1900 (d) 2100
24. 24.Which is closest to 898 ÷ 31? (a) 60 (b) 30 (c) 300 (d) 15
25. 25.Which is closest to 1193 ÷ 19? (a) 600 (b) 120 (c) 60 (d) 30
26. 26.Which is closest to 903 × 78? (Round each number first.) (a) 72000 (b) 7200 (c) 720000 (d) 144000
27. 27.Which is closest to 602 + 205 + 396? (a) 1300 (b) 1400 (c) 1100 (d) 1200
28. 28.Which is closest to 305 + 702 + 303? (a) 1400 (b) 1200 (c) 1500 (d) 1300
29. 29.Which is closest to 1609 ÷ 21? (a) 800 (b) 80 (c) 160 (d) 40
30. 30.Which is closest to 402 × 80? (Round each number first.) (a) 32000 (b) 320000 (c) 64000 (d) 3200
31. 31.Which is closest to 300 × 28? (Round each number first.) (a) 900 (b) 18000 (c) 9000 (d) 90000
32. 32.Round 15406 to the nearest hundred.
33. 33.Which is closest to 606 ÷ 31? (a) 200 (b) 10 (c) 20 (d) 40
34. 34.Which is closest to 297 × 39? (Round each number first.) (a) 120000 (b) 12000 (c) 24000 (d) 1200
35. 35.Which is closest to 901 + 196 + 399? (a) 1400 (b) 1600 (c) 1500 (d) 1700
36. 36.Which is closest to 398 + 596 + 896? (a) 2100 (b) 1900 (c) 1800 (d) 2000
37. 37.Which is closest to 602 × 48? (Round each number first.) (a) 300000 (b) 30000 (c) 60000 (d) 3000
38. 38.Which is closest to 304 × 82? (Round each number first.) (a) 2400 (b) 24000 (c) 48000 (d) 240000
39. 39.Round 52.77 to one decimal place. =
40. 40.Which is closest to 196 + 403 + 600? (a) 1300 (b) 1100 (c) 1400 (d) 1200

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