Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 881 · 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 95240 to the nearest thousand.
2. 2.Which is closest to 297 × 21? (Round each number first.) (a) 12000 (b) 60000 (c) 600 (d) 6000
3. 3.Which is closest to 297 + 501 + 905? (a) 1900 (b) 1700 (c) 1600 (d) 1800
4. 4.Which is closest to 904 × 19? (Round each number first.) (a) 180000 (b) 18000 (c) 36000 (d) 1800
5. 5.Round 65566 to the nearest ten.
6. 6.Round 36059 to the nearest thousand.
7. 7.Round 27.39 to one decimal place. =
8. 8.Round 70.26 to one decimal place. =
9. 9.Which is closest to 695 + 797 + 405? (a) 2100 (b) 2000 (c) 1800 (d) 1900
10. 10.Which is closest to 796 × 78? (Round each number first.) (a) 6400 (b) 128000 (c) 640000 (d) 64000
11. 11.Round 66.41 to one decimal place. =
12. 12.Round 49.32 to one decimal place. =
13. 13.Which is closest to 4494 ÷ 49? (a) 900 (b) 180 (c) 45 (d) 90
14. 14.Round 73.43 to one decimal place. =
15. 15.Round 38.78 to one decimal place. =
16. 16.Which is closest to 906 ÷ 31? (a) 15 (b) 60 (c) 30 (d) 300
17. 17.Which is closest to 793 ÷ 21? (a) 400 (b) 40 (c) 80 (d) 20
18. 18.Which is closest to 300 + 501 + 295? (a) 1100 (b) 1200 (c) 1000 (d) 1300
19. 19.Which is closest to 395 + 204 + 197? (a) 900 (b) 800 (c) 1000 (d) 700
20. 20.Which is closest to 398 × 19? (Round each number first.) (a) 8000 (b) 16000 (c) 800 (d) 80000
21. 21.Which is closest to 900 × 48? (Round each number first.) (a) 90000 (b) 4500 (c) 450000 (d) 45000
22. 22.Which is closest to 198 × 52? (Round each number first.) (a) 100000 (b) 20000 (c) 1000 (d) 10000
23. 23.Which is closest to 102 + 496 + 298? (a) 900 (b) 1000 (c) 800 (d) 1100
24. 24.Which is closest to 896 × 91? (Round each number first.) (a) 810000 (b) 8100 (c) 162000 (d) 81000
25. 25.Round 72.61 to one decimal place. =
26. 26.Which is closest to 702 × 89? (Round each number first.) (a) 630000 (b) 6300 (c) 126000 (d) 63000
27. 27.Which is closest to 803 × 69? (Round each number first.) (a) 560000 (b) 112000 (c) 56000 (d) 5600
28. 28.Which is closest to 299 + 801 + 900? (a) 2200 (b) 1900 (c) 2100 (d) 2000
29. 29.Which is closest to 304 × 68? (Round each number first.) (a) 42000 (b) 2100 (c) 210000 (d) 21000
30. 30.Round 29817 to the nearest ten.
31. 31.Round 55808 to the nearest ten.
32. 32.Round 93.91 to one decimal place. =
33. 33.Which is closest to 400 × 19? (Round each number first.) (a) 8000 (b) 800 (c) 16000 (d) 80000
34. 34.Which is closest to 796 + 603 + 799? (a) 2300 (b) 2200 (c) 2100 (d) 2400
35. 35.Which is closest to 600 × 28? (Round each number first.) (a) 36000 (b) 18000 (c) 180000 (d) 1800
36. 36.Which is closest to 497 × 92? (Round each number first.) (a) 90000 (b) 4500 (c) 450000 (d) 45000
37. 37.Round 57.08 to one decimal place. =
38. 38.Which is closest to 896 + 395 + 96? (a) 1400 (b) 1300 (c) 1500 (d) 1600
39. 39.Round 59428 to the nearest ten.
40. 40.Which is closest to 105 + 497 + 200? (a) 700 (b) 800 (c) 1000 (d) 900

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