Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 864 · 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 204 × 31? (Round each number first.) (a) 6000 (b) 12000 (c) 60000 (d) 600
2. 2.Which is closest to 497 + 95 + 802? (a) 1600 (b) 1300 (c) 1400 (d) 1500
3. 3.Which is closest to 402 × 22? (Round each number first.) (a) 800 (b) 8000 (c) 16000 (d) 80000
4. 4.Which is closest to 295 + 199 + 396? (a) 1000 (b) 900 (c) 800 (d) 1100
5. 5.Round 15825 to the nearest hundred.
6. 6.Round 3153 to the nearest thousand.
7. 7.Round 47819 to the nearest hundred.
8. 8.Which is closest to 799 + 196 + 102? (a) 1000 (b) 1100 (c) 1200 (d) 1300
9. 9.Round 40530 to the nearest thousand.
10. 10.Round 10575 to the nearest thousand.
11. 11.Which is closest to 2392 ÷ 31? (a) 800 (b) 160 (c) 80 (d) 40
12. 12.Which is closest to 899 × 72? (Round each number first.) (a) 6300 (b) 630000 (c) 126000 (d) 63000
13. 13.Which is closest to 798 + 195 + 796? (a) 2000 (b) 1800 (c) 1700 (d) 1900
14. 14.Round 89630 to the nearest thousand.
15. 15.Round 34.88 to one decimal place. =
16. 16.Which is closest to 502 × 19? (Round each number first.) (a) 1000 (b) 10000 (c) 100000 (d) 20000
17. 17.Which is closest to 700 + 502 + 195? (a) 1400 (b) 1300 (c) 1600 (d) 1500
18. 18.Round 39.94 to one decimal place. =
19. 19.Which is closest to 201 + 804 + 903? (a) 2000 (b) 1800 (c) 1900 (d) 2100
20. 20.Which is closest to 3005 ÷ 51? (a) 60 (b) 120 (c) 600 (d) 30
21. 21.Round 15.76 to one decimal place. =
22. 22.Which is closest to 501 × 49? (Round each number first.) (a) 250000 (b) 50000 (c) 2500 (d) 25000
23. 23.Which is closest to 2700 ÷ 31? (a) 45 (b) 900 (c) 90 (d) 180
24. 24.Round 79.43 to one decimal place. =
25. 25.Round 76543 to the nearest ten.
26. 26.Round 86.67 to one decimal place. =
27. 27.Which is closest to 601 + 296 + 401? (a) 1200 (b) 1500 (c) 1300 (d) 1400
28. 28.Which is closest to 2497 ÷ 49? (a) 25 (b) 50 (c) 500 (d) 100
29. 29.Round 79.46 to one decimal place. =
30. 30.Which is closest to 601 + 397 + 103? (a) 1200 (b) 1100 (c) 1300 (d) 1000
31. 31.Round 20201 to the nearest thousand.
32. 32.Which is closest to 501 × 59? (Round each number first.) (a) 60000 (b) 30000 (c) 3000 (d) 300000
33. 33.Round 41.78 to one decimal place. =
34. 34.Which is closest to 901 × 32? (Round each number first.) (a) 2700 (b) 27000 (c) 54000 (d) 270000
35. 35.Which is closest to 902 × 41? (Round each number first.) (a) 360000 (b) 3600 (c) 36000 (d) 72000
36. 36.Round 96.89 to one decimal place. =
37. 37.Which is closest to 898 ÷ 29? (a) 60 (b) 15 (c) 300 (d) 30
38. 38.Which is closest to 496 + 602 + 300? (a) 1500 (b) 1400 (c) 1300 (d) 1600
39. 39.Round 3889 to the nearest hundred.
40. 40.Which is closest to 595 + 698 + 204? (a) 1600 (b) 1500 (c) 1400 (d) 1700

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