Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 549 · 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 17.48 to one decimal place. =
2. 2.Which is closest to 391 ÷ 19? (a) 200 (b) 20 (c) 10 (d) 40
3. 3.Round 15463 to the nearest ten.
4. 4.Which is closest to 1194 ÷ 21? (a) 60 (b) 120 (c) 30 (d) 600
5. 5.Round 17885 to the nearest thousand.
6. 6.Round 77591 to the nearest hundred.
7. 7.Round 6878 to the nearest ten.
8. 8.Which is closest to 699 + 603 + 695? (a) 2200 (b) 2000 (c) 2100 (d) 1900
9. 9.Which is closest to 501 × 29? (Round each number first.) (a) 1500 (b) 150000 (c) 15000 (d) 30000
10. 10.Which is closest to 599 × 70? (Round each number first.) (a) 4200 (b) 84000 (c) 420000 (d) 42000
11. 11.Round 19.29 to one decimal place. =
12. 12.Which is closest to 602 + 598 + 598? (a) 1900 (b) 1800 (c) 1700 (d) 2000
13. 13.Which is closest to 900 + 399 + 895? (a) 2100 (b) 2400 (c) 2300 (d) 2200
14. 14.Which is closest to 899 × 60? (Round each number first.) (a) 108000 (b) 5400 (c) 54000 (d) 540000
15. 15.Round 22.61 to one decimal place. =
16. 16.Which is closest to 2702 ÷ 31? (a) 180 (b) 90 (c) 45 (d) 900
17. 17.Which is closest to 198 × 59? (Round each number first.) (a) 12000 (b) 24000 (c) 120000 (d) 1200
18. 18.Which is closest to 200 × 21? (Round each number first.) (a) 400 (b) 4000 (c) 40000 (d) 8000
19. 19.Which is closest to 897 × 58? (Round each number first.) (a) 5400 (b) 540000 (c) 54000 (d) 108000
20. 20.Which is closest to 698 + 602 + 897? (a) 2100 (b) 2400 (c) 2300 (d) 2200
21. 21.Which is closest to 199 + 403 + 595? (a) 1100 (b) 1200 (c) 1400 (d) 1300
22. 22.Which is closest to 596 + 101 + 203? (a) 1100 (b) 1000 (c) 800 (d) 900
23. 23.Round 14.91 to one decimal place. =
24. 24.Which is closest to 807 ÷ 41? (a) 20 (b) 200 (c) 10 (d) 40
25. 25.Round 90954 to the nearest thousand.
26. 26.Which is closest to 796 × 59? (Round each number first.) (a) 48000 (b) 480000 (c) 4800 (d) 96000
27. 27.Which is closest to 803 × 88? (Round each number first.) (a) 144000 (b) 72000 (c) 720000 (d) 7200
28. 28.Round 20988 to the nearest thousand.
29. 29.Which is closest to 96 + 701 + 103? (a) 900 (b) 800 (c) 1000 (d) 1100
30. 30.Which is closest to 896 × 49? (Round each number first.) (a) 90000 (b) 45000 (c) 450000 (d) 4500
31. 31.Round 25112 to the nearest ten.
32. 32.Round 11079 to the nearest ten.
33. 33.Which is closest to 3506 ÷ 49? (a) 35 (b) 140 (c) 70 (d) 700
34. 34.Round 76813 to the nearest ten.
35. 35.Which is closest to 2800 ÷ 39? (a) 70 (b) 35 (c) 700 (d) 140
36. 36.Round 80007 to the nearest thousand.
37. 37.Round 34265 to the nearest thousand.
38. 38.Which is closest to 501 × 30? (Round each number first.) (a) 150000 (b) 1500 (c) 15000 (d) 30000
39. 39.Which is closest to 804 + 105 + 399? (a) 1200 (b) 1300 (c) 1400 (d) 1500
40. 40.Round 18.18 to one decimal place. =

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