Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 714 · 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 38.91 to one decimal place. =
2. 2.Which is closest to 898 × 70? (Round each number first.) (a) 6300 (b) 63000 (c) 630000 (d) 126000
3. 3.Round 27303 to the nearest ten.
4. 4.Round 80.23 to one decimal place. =
5. 5.Round 80768 to the nearest hundred.
6. 6.Round 22.29 to one decimal place. =
7. 7.Round 48.21 to one decimal place. =
8. 8.Round 50.12 to one decimal place. =
9. 9.Which is closest to 600 + 805 + 404? (a) 1900 (b) 1800 (c) 1700 (d) 2000
10. 10.Round 29.53 to one decimal place. =
11. 11.Round 82928 to the nearest hundred.
12. 12.Round 28.87 to one decimal place. =
13. 13.Round 60034 to the nearest thousand.
14. 14.Round 72665 to the nearest hundred.
15. 15.Round 55.72 to one decimal place. =
16. 16.Which is closest to 395 + 604 + 305? (a) 1200 (b) 1500 (c) 1400 (d) 1300
17. 17.Round 56520 to the nearest thousand.
18. 18.Which is closest to 303 × 22? (Round each number first.) (a) 6000 (b) 60000 (c) 12000 (d) 600
19. 19.Round 57.91 to one decimal place. =
20. 20.Which is closest to 600 × 81? (Round each number first.) (a) 96000 (b) 4800 (c) 48000 (d) 480000
21. 21.Which is closest to 2494 ÷ 51? (a) 25 (b) 100 (c) 50 (d) 500
22. 22.Which is closest to 602 + 202 + 599? (a) 1500 (b) 1300 (c) 1400 (d) 1600
23. 23.Which is closest to 97 + 404 + 96? (a) 600 (b) 800 (c) 500 (d) 700
24. 24.Which is closest to 703 + 96 + 499? (a) 1500 (b) 1200 (c) 1400 (d) 1300
25. 25.Round 1704 to the nearest thousand.
26. 26.Round 26867 to the nearest hundred.
27. 27.Which is closest to 299 × 28? (Round each number first.) (a) 90000 (b) 9000 (c) 18000 (d) 900
28. 28.Round 72954 to the nearest hundred.
29. 29.Which is closest to 796 ÷ 19? (a) 80 (b) 400 (c) 20 (d) 40
30. 30.Round 18853 to the nearest thousand.
31. 31.Which is closest to 794 ÷ 41? (a) 200 (b) 10 (c) 20 (d) 40
32. 32.Round 52.47 to one decimal place. =
33. 33.Which is closest to 800 + 798 + 704? (a) 2400 (b) 2300 (c) 2500 (d) 2200
34. 34.Which is closest to 4006 ÷ 49? (a) 160 (b) 800 (c) 40 (d) 80
35. 35.Round 19.18 to one decimal place. =
36. 36.Which is closest to 399 × 91? (Round each number first.) (a) 360000 (b) 36000 (c) 72000 (d) 3600
37. 37.Which is closest to 392 ÷ 21? (a) 40 (b) 10 (c) 20 (d) 200
38. 38.Round 14384 to the nearest hundred.
39. 39.Which is closest to 501 × 18? (Round each number first.) (a) 20000 (b) 10000 (c) 1000 (d) 100000
40. 40.Round 43703 to the nearest ten.

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