Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 573 · 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 85611 to the nearest hundred.
2. 2.Round 17303 to the nearest ten.
3. 3.Which is closest to 796 × 91? (Round each number first.) (a) 144000 (b) 7200 (c) 720000 (d) 72000
4. 4.Round 43851 to the nearest thousand.
5. 5.Which is closest to 598 × 29? (Round each number first.) (a) 36000 (b) 180000 (c) 1800 (d) 18000
6. 6.Which is closest to 496 × 82? (Round each number first.) (a) 80000 (b) 400000 (c) 4000 (d) 40000
7. 7.Which is closest to 399 × 41? (Round each number first.) (a) 16000 (b) 1600 (c) 160000 (d) 32000
8. 8.Which is closest to 3207 ÷ 39? (a) 160 (b) 800 (c) 40 (d) 80
9. 9.Round 3522 to the nearest hundred.
10. 10.Which is closest to 399 × 58? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
11. 11.Round 35858 to the nearest thousand.
12. 12.Round 74.21 to one decimal place. =
13. 13.Which is closest to 300 × 91? (Round each number first.) (a) 270000 (b) 2700 (c) 54000 (d) 27000
14. 14.Which is closest to 898 × 42? (Round each number first.) (a) 36000 (b) 3600 (c) 360000 (d) 72000
15. 15.Round 26916 to the nearest hundred.
16. 16.Which is closest to 597 ÷ 19? (a) 30 (b) 60 (c) 300 (d) 15
17. 17.Which is closest to 396 × 20? (Round each number first.) (a) 16000 (b) 8000 (c) 80000 (d) 800
18. 18.Round 92628 to the nearest thousand.
19. 19.Which is closest to 795 ÷ 39? (a) 40 (b) 10 (c) 200 (d) 20
20. 20.Which is closest to 301 + 502 + 499? (a) 1400 (b) 1200 (c) 1300 (d) 1500
21. 21.Which is closest to 701 + 200 + 104? (a) 1000 (b) 1100 (c) 1200 (d) 900
22. 22.Round 15892 to the nearest hundred.
23. 23.Which is closest to 896 × 81? (Round each number first.) (a) 720000 (b) 144000 (c) 7200 (d) 72000
24. 24.Round 69726 to the nearest ten.
25. 25.Round 5880 to the nearest thousand.
26. 26.Which is closest to 798 × 22? (Round each number first.) (a) 16000 (b) 160000 (c) 1600 (d) 32000
27. 27.Which is closest to 897 × 89? (Round each number first.) (a) 8100 (b) 162000 (c) 810000 (d) 81000
28. 28.Round 52.22 to one decimal place. =
29. 29.Which is closest to 596 × 38? (Round each number first.) (a) 2400 (b) 240000 (c) 48000 (d) 24000
30. 30.Which is closest to 2399 ÷ 41? (a) 30 (b) 600 (c) 60 (d) 120
31. 31.Which is closest to 296 + 900 + 501? (a) 1600 (b) 1700 (c) 1900 (d) 1800
32. 32.Which is closest to 797 × 89? (Round each number first.) (a) 144000 (b) 7200 (c) 720000 (d) 72000
33. 33.Which is closest to 2704 ÷ 29? (a) 180 (b) 45 (c) 900 (d) 90
34. 34.Round 8672 to the nearest thousand.
35. 35.Which is closest to 295 + 104 + 96? (a) 500 (b) 600 (c) 700 (d) 400
36. 36.Which is closest to 900 + 896 + 103? (a) 1800 (b) 1900 (c) 2000 (d) 2100
37. 37.Which is closest to 804 × 61? (Round each number first.) (a) 4800 (b) 96000 (c) 480000 (d) 48000
38. 38.Round 58.84 to one decimal place. =
39. 39.Which is closest to 409 ÷ 19? (a) 20 (b) 40 (c) 200 (d) 10
40. 40.Round 56.22 to one decimal place. =

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