Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 803 · 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 700 × 78? (Round each number first.) (a) 5600 (b) 112000 (c) 56000 (d) 560000
2. 2.Which is closest to 1205 ÷ 41? (a) 30 (b) 15 (c) 300 (d) 60
3. 3.Which is closest to 204 + 703 + 695? (a) 1700 (b) 1500 (c) 1800 (d) 1600
4. 4.Which is closest to 1500 ÷ 31? (a) 500 (b) 50 (c) 25 (d) 100
5. 5.Which is closest to 796 ÷ 19? (a) 80 (b) 40 (c) 20 (d) 400
6. 6.Which is closest to 1603 ÷ 19? (a) 160 (b) 80 (c) 800 (d) 40
7. 7.Which is closest to 699 × 50? (Round each number first.) (a) 35000 (b) 70000 (c) 3500 (d) 350000
8. 8.Which is closest to 200 + 102 + 198? (a) 700 (b) 500 (c) 400 (d) 600
9. 9.Which is closest to 599 × 69? (Round each number first.) (a) 42000 (b) 4200 (c) 84000 (d) 420000
10. 10.Which is closest to 197 + 95 + 500? (a) 800 (b) 700 (c) 1000 (d) 900
11. 11.Which is closest to 299 + 801 + 796? (a) 1800 (b) 1900 (c) 2100 (d) 2000
12. 12.Which is closest to 404 × 81? (Round each number first.) (a) 32000 (b) 320000 (c) 3200 (d) 64000
13. 13.Which is closest to 1593 ÷ 19? (a) 800 (b) 40 (c) 80 (d) 160
14. 14.Which is closest to 301 × 58? (Round each number first.) (a) 36000 (b) 18000 (c) 180000 (d) 1800
15. 15.Which is closest to 304 × 82? (Round each number first.) (a) 2400 (b) 48000 (c) 240000 (d) 24000
16. 16.Round 74924 to the nearest ten.
17. 17.Round 51.81 to one decimal place. =
18. 18.Round 82729 to the nearest thousand.
19. 19.Round 38301 to the nearest ten.
20. 20.Round 94331 to the nearest hundred.
21. 21.Round 18748 to the nearest thousand.
22. 22.Round 93062 to the nearest thousand.
23. 23.Which is closest to 397 × 78? (Round each number first.) (a) 320000 (b) 3200 (c) 64000 (d) 32000
24. 24.Round 49168 to the nearest thousand.
25. 25.Which is closest to 402 + 599 + 304? (a) 1500 (b) 1300 (c) 1200 (d) 1400
26. 26.Round 5704 to the nearest ten.
27. 27.Which is closest to 904 + 697 + 204? (a) 1800 (b) 2000 (c) 1900 (d) 1700
28. 28.Which is closest to 300 × 92? (Round each number first.) (a) 2700 (b) 27000 (c) 270000 (d) 54000
29. 29.Which is closest to 800 × 62? (Round each number first.) (a) 48000 (b) 4800 (c) 96000 (d) 480000
30. 30.Which is closest to 298 × 91? (Round each number first.) (a) 27000 (b) 2700 (c) 54000 (d) 270000
31. 31.Round 2060 to the nearest hundred.
32. 32.Round 59.38 to one decimal place. =
33. 33.Which is closest to 297 + 202 + 202? (a) 800 (b) 900 (c) 700 (d) 600
34. 34.Round 87331 to the nearest thousand.
35. 35.Round 70.82 to one decimal place. =
36. 36.Round 53775 to the nearest hundred.
37. 37.Which is closest to 608 ÷ 19? (a) 15 (b) 300 (c) 30 (d) 60
38. 38.Which is closest to 198 × 69? (Round each number first.) (a) 1400 (b) 28000 (c) 140000 (d) 14000
39. 39.Which is closest to 599 × 80? (Round each number first.) (a) 480000 (b) 48000 (c) 96000 (d) 4800
40. 40.Round 31.88 to one decimal place. =

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