Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 249 · 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 68666 to the nearest thousand.
2. 2.Which is closest to 497 × 40? (Round each number first.) (a) 20000 (b) 40000 (c) 2000 (d) 200000
3. 3.Round 26.06 to one decimal place. =
4. 4.Which is closest to 3209 ÷ 41? (a) 80 (b) 160 (c) 40 (d) 800
5. 5.Which is closest to 2696 ÷ 29? (a) 180 (b) 90 (c) 45 (d) 900
6. 6.Round 61.56 to one decimal place. =
7. 7.Round 90.74 to one decimal place. =
8. 8.Round 28.07 to one decimal place. =
9. 9.Which is closest to 696 + 705 + 798? (a) 2400 (b) 2200 (c) 2300 (d) 2100
10. 10.Which is closest to 897 + 197 + 795? (a) 2000 (b) 1800 (c) 1900 (d) 2100
11. 11.Round 40946 to the nearest thousand.
12. 12.Which is closest to 700 × 82? (Round each number first.) (a) 560000 (b) 56000 (c) 112000 (d) 5600
13. 13.Round 13153 to the nearest ten.
14. 14.Which is closest to 3608 ÷ 41? (a) 180 (b) 45 (c) 90 (d) 900
15. 15.Round 76966 to the nearest thousand.
16. 16.Which is closest to 2005 ÷ 39? (a) 50 (b) 100 (c) 25 (d) 500
17. 17.Round 38.27 to one decimal place. =
18. 18.Which is closest to 97 + 502 + 595? (a) 1100 (b) 1200 (c) 1400 (d) 1300
19. 19.Round 37748 to the nearest thousand.
20. 20.Round 7374 to the nearest ten.
21. 21.Which is closest to 197 + 603 + 304? (a) 1200 (b) 1000 (c) 1100 (d) 1300
22. 22.Round 8039 to the nearest hundred.
23. 23.Which is closest to 805 ÷ 19? (a) 400 (b) 20 (c) 40 (d) 80
24. 24.Which is closest to 298 × 20? (Round each number first.) (a) 600 (b) 12000 (c) 6000 (d) 60000
25. 25.Which is closest to 197 × 40? (Round each number first.) (a) 8000 (b) 16000 (c) 800 (d) 80000
26. 26.Which is closest to 899 × 58? (Round each number first.) (a) 5400 (b) 540000 (c) 54000 (d) 108000
27. 27.Which is closest to 1195 ÷ 41? (a) 60 (b) 300 (c) 30 (d) 15
28. 28.Which is closest to 399 + 598 + 405? (a) 1400 (b) 1500 (c) 1600 (d) 1300
29. 29.Which is closest to 3198 ÷ 41? (a) 160 (b) 40 (c) 800 (d) 80
30. 30.Which is closest to 697 × 48? (Round each number first.) (a) 3500 (b) 35000 (c) 70000 (d) 350000
31. 31.Round 17969 to the nearest thousand.
32. 32.Round 88487 to the nearest thousand.
33. 33.Round 25493 to the nearest ten.
34. 34.Which is closest to 704 × 88? (Round each number first.) (a) 6300 (b) 630000 (c) 63000 (d) 126000
35. 35.Which is closest to 2397 ÷ 41? (a) 120 (b) 30 (c) 600 (d) 60
36. 36.Round 60168 to the nearest hundred.
37. 37.Round 45852 to the nearest ten.
38. 38.Round 16.87 to one decimal place. =
39. 39.Round 40415 to the nearest hundred.
40. 40.Which is closest to 203 × 81? (Round each number first.) (a) 16000 (b) 160000 (c) 1600 (d) 32000

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