Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 847 · 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 498 × 22? (Round each number first.) (a) 20000 (b) 1000 (c) 10000 (d) 100000
2. 2.Round 39.61 to one decimal place. =
3. 3.Round 54.77 to one decimal place. =
4. 4.Which is closest to 796 × 68? (Round each number first.) (a) 5600 (b) 560000 (c) 112000 (d) 56000
5. 5.Which is closest to 797 + 301 + 396? (a) 1700 (b) 1500 (c) 1400 (d) 1600
6. 6.Round 12.72 to one decimal place. =
7. 7.Which is closest to 904 + 797 + 701? (a) 2500 (b) 2300 (c) 2400 (d) 2600
8. 8.Which is closest to 700 × 89? (Round each number first.) (a) 63000 (b) 126000 (c) 6300 (d) 630000
9. 9.Which is closest to 905 + 197 + 598? (a) 1700 (b) 1800 (c) 1600 (d) 1900
10. 10.Round 40872 to the nearest thousand.
11. 11.Round 69.53 to one decimal place. =
12. 12.Which is closest to 902 × 71? (Round each number first.) (a) 126000 (b) 630000 (c) 6300 (d) 63000
13. 13.Which is closest to 903 × 20? (Round each number first.) (a) 18000 (b) 36000 (c) 1800 (d) 180000
14. 14.Which is closest to 97 + 599 + 897? (a) 1800 (b) 1700 (c) 1600 (d) 1500
15. 15.Which is closest to 803 × 90? (Round each number first.) (a) 144000 (b) 7200 (c) 720000 (d) 72000
16. 16.Which is closest to 298 × 61? (Round each number first.) (a) 1800 (b) 180000 (c) 36000 (d) 18000
17. 17.Which is closest to 602 × 82? (Round each number first.) (a) 4800 (b) 48000 (c) 480000 (d) 96000
18. 18.Round 11.74 to one decimal place. =
19. 19.Round 83.32 to one decimal place. =
20. 20.Round 28429 to the nearest hundred.
21. 21.Which is closest to 396 + 196 + 804? (a) 1500 (b) 1400 (c) 1600 (d) 1300
22. 22.Which is closest to 1595 ÷ 41? (a) 80 (b) 400 (c) 20 (d) 40
23. 23.Which is closest to 301 × 21? (Round each number first.) (a) 60000 (b) 600 (c) 6000 (d) 12000
24. 24.Which is closest to 597 + 96 + 496? (a) 1200 (b) 1300 (c) 1100 (d) 1400
25. 25.Which is closest to 199 × 92? (Round each number first.) (a) 36000 (b) 180000 (c) 18000 (d) 1800
26. 26.Round 85.92 to one decimal place. =
27. 27.Which is closest to 97 + 203 + 295? (a) 700 (b) 600 (c) 800 (d) 500
28. 28.Which is closest to 809 ÷ 41? (a) 10 (b) 20 (c) 40 (d) 200
29. 29.Which is closest to 502 + 197 + 501? (a) 1300 (b) 1400 (c) 1200 (d) 1100
30. 30.Which is closest to 498 + 396 + 402? (a) 1500 (b) 1400 (c) 1300 (d) 1200
31. 31.Which is closest to 199 + 598 + 205? (a) 1100 (b) 900 (c) 1200 (d) 1000
32. 32.Which is closest to 302 × 42? (Round each number first.) (a) 24000 (b) 1200 (c) 12000 (d) 120000
33. 33.Which is closest to 196 + 396 + 102? (a) 900 (b) 600 (c) 800 (d) 700
34. 34.Which is closest to 204 × 89? (Round each number first.) (a) 180000 (b) 18000 (c) 1800 (d) 36000
35. 35.Which is closest to 201 × 80? (Round each number first.) (a) 32000 (b) 16000 (c) 160000 (d) 1600
36. 36.Round 33072 to the nearest hundred.
37. 37.Round 34839 to the nearest ten.
38. 38.Which is closest to 2096 ÷ 31? (a) 35 (b) 140 (c) 700 (d) 70
39. 39.Round 93874 to the nearest ten.
40. 40.Which is closest to 297 × 18? (Round each number first.) (a) 60000 (b) 12000 (c) 600 (d) 6000

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