Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 795 · 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 501 × 58? (Round each number first.) (a) 30000 (b) 300000 (c) 3000 (d) 60000
2. 2.Round 85577 to the nearest thousand.
3. 3.Which is closest to 504 × 41? (Round each number first.) (a) 2000 (b) 200000 (c) 40000 (d) 20000
4. 4.Round 75134 to the nearest hundred.
5. 5.Which is closest to 1591 ÷ 21? (a) 800 (b) 80 (c) 160 (d) 40
6. 6.Round 63302 to the nearest ten.
7. 7.Round 46930 to the nearest hundred.
8. 8.Which is closest to 296 + 902 + 296? (a) 1400 (b) 1600 (c) 1700 (d) 1500
9. 9.Round 90340 to the nearest hundred.
10. 10.Round 73892 to the nearest ten.
11. 11.Which is closest to 898 × 41? (Round each number first.) (a) 36000 (b) 72000 (c) 3600 (d) 360000
12. 12.Round 63.12 to one decimal place. =
13. 13.Which is closest to 405 + 504 + 603? (a) 1400 (b) 1600 (c) 1700 (d) 1500
14. 14.Round 20987 to the nearest ten.
15. 15.Which is closest to 3507 ÷ 51? (a) 700 (b) 35 (c) 140 (d) 70
16. 16.Round 31932 to the nearest thousand.
17. 17.Round 17.77 to one decimal place. =
18. 18.Which is closest to 1195 ÷ 39? (a) 300 (b) 30 (c) 60 (d) 15
19. 19.Which is closest to 302 × 91? (Round each number first.) (a) 2700 (b) 270000 (c) 27000 (d) 54000
20. 20.Round 14.23 to one decimal place. =
21. 21.Round 30.42 to one decimal place. =
22. 22.Which is closest to 596 ÷ 21? (a) 300 (b) 15 (c) 30 (d) 60
23. 23.Round 49256 to the nearest hundred.
24. 24.Round 91776 to the nearest thousand.
25. 25.Which is closest to 697 × 18? (Round each number first.) (a) 140000 (b) 14000 (c) 1400 (d) 28000
26. 26.Round 60.52 to one decimal place. =
27. 27.Round 27.36 to one decimal place. =
28. 28.Round 86.28 to one decimal place. =
29. 29.Which is closest to 1394 ÷ 21? (a) 700 (b) 140 (c) 70 (d) 35
30. 30.Round 38024 to the nearest thousand.
31. 31.Round 14372 to the nearest thousand.
32. 32.Which is closest to 399 × 21? (Round each number first.) (a) 16000 (b) 80000 (c) 800 (d) 8000
33. 33.Which is closest to 1195 ÷ 41? (a) 30 (b) 300 (c) 60 (d) 15
34. 34.Which is closest to 695 + 602 + 897? (a) 2400 (b) 2200 (c) 2100 (d) 2300
35. 35.Round 33657 to the nearest ten.
36. 36.Which is closest to 703 + 601 + 895? (a) 2100 (b) 2300 (c) 2400 (d) 2200
37. 37.Round 14908 to the nearest thousand.
38. 38.Which is closest to 796 + 801 + 496? (a) 2300 (b) 2200 (c) 2000 (d) 2100
39. 39.Which is closest to 402 × 69? (Round each number first.) (a) 2800 (b) 56000 (c) 280000 (d) 28000
40. 40.Which is closest to 2004 ÷ 49? (a) 40 (b) 20 (c) 400 (d) 80

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