Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 152 · 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 704 × 89? (Round each number first.) (a) 630000 (b) 6300 (c) 126000 (d) 63000
2. 2.Which is closest to 596 × 88? (Round each number first.) (a) 540000 (b) 108000 (c) 5400 (d) 54000
3. 3.Round 71.79 to one decimal place. =
4. 4.Round 1788 to the nearest ten.
5. 5.Which is closest to 797 + 796 + 203? (a) 1700 (b) 1800 (c) 1900 (d) 2000
6. 6.Round 4418 to the nearest ten.
7. 7.Which is closest to 103 + 304 + 98? (a) 400 (b) 600 (c) 500 (d) 700
8. 8.Which is closest to 802 × 18? (Round each number first.) (a) 1600 (b) 32000 (c) 160000 (d) 16000
9. 9.Round 22.07 to one decimal place. =
10. 10.Which is closest to 298 × 48? (Round each number first.) (a) 150000 (b) 1500 (c) 15000 (d) 30000
11. 11.Which is closest to 798 × 32? (Round each number first.) (a) 48000 (b) 240000 (c) 24000 (d) 2400
12. 12.Which is closest to 2807 ÷ 41? (a) 700 (b) 70 (c) 35 (d) 140
13. 13.Which is closest to 599 + 397 + 304? (a) 1200 (b) 1300 (c) 1400 (d) 1500
14. 14.Which is closest to 300 × 38? (Round each number first.) (a) 24000 (b) 120000 (c) 12000 (d) 1200
15. 15.Which is closest to 296 × 39? (Round each number first.) (a) 24000 (b) 12000 (c) 1200 (d) 120000
16. 16.Which is closest to 496 × 92? (Round each number first.) (a) 45000 (b) 4500 (c) 90000 (d) 450000
17. 17.Which is closest to 504 + 205 + 398? (a) 1000 (b) 1200 (c) 1100 (d) 1300
18. 18.Round 37.22 to one decimal place. =
19. 19.Which is closest to 601 × 48? (Round each number first.) (a) 30000 (b) 300000 (c) 3000 (d) 60000
20. 20.Which is closest to 397 × 59? (Round each number first.) (a) 2400 (b) 240000 (c) 48000 (d) 24000
21. 21.Round 68864 to the nearest thousand.
22. 22.Which is closest to 1493 ÷ 51? (a) 300 (b) 15 (c) 60 (d) 30
23. 23.Which is closest to 798 + 198 + 897? (a) 1800 (b) 2000 (c) 1900 (d) 2100
24. 24.Which is closest to 203 × 71? (Round each number first.) (a) 28000 (b) 140000 (c) 1400 (d) 14000
25. 25.Which is closest to 701 + 797 + 900? (a) 2400 (b) 2600 (c) 2300 (d) 2500
26. 26.Which is closest to 496 × 62? (Round each number first.) (a) 3000 (b) 30000 (c) 60000 (d) 300000
27. 27.Round 34.93 to one decimal place. =
28. 28.Which is closest to 202 + 703 + 395? (a) 1500 (b) 1400 (c) 1300 (d) 1200
29. 29.Which is closest to 907 ÷ 31? (a) 15 (b) 60 (c) 300 (d) 30
30. 30.Round 70407 to the nearest ten.
31. 31.Round 29.57 to one decimal place. =
32. 32.Round 15.22 to one decimal place. =
33. 33.Which is closest to 2399 ÷ 31? (a) 80 (b) 800 (c) 40 (d) 160
34. 34.Round 32.44 to one decimal place. =
35. 35.Which is closest to 904 × 62? (Round each number first.) (a) 54000 (b) 540000 (c) 5400 (d) 108000
36. 36.Which is closest to 402 × 18? (Round each number first.) (a) 80000 (b) 8000 (c) 800 (d) 16000
37. 37.Which is closest to 1198 ÷ 19? (a) 600 (b) 30 (c) 120 (d) 60
38. 38.Round 6961 to the nearest thousand.
39. 39.Which is closest to 591 ÷ 21? (a) 30 (b) 60 (c) 15 (d) 300
40. 40.Round 72.51 to one decimal place. =

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