Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 754 · 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 74.93 to one decimal place. =
2. 2.Which is closest to 197 × 58? (Round each number first.) (a) 12000 (b) 120000 (c) 1200 (d) 24000
3. 3.Round 8107 to the nearest ten.
4. 4.Round 13.06 to one decimal place. =
5. 5.Which is closest to 599 × 62? (Round each number first.) (a) 72000 (b) 360000 (c) 3600 (d) 36000
6. 6.Which is closest to 901 + 401 + 396? (a) 1900 (b) 1600 (c) 1800 (d) 1700
7. 7.Which is closest to 499 + 295 + 95? (a) 900 (b) 800 (c) 1000 (d) 1100
8. 8.Round 22251 to the nearest ten.
9. 9.Which is closest to 902 × 18? (Round each number first.) (a) 36000 (b) 180000 (c) 1800 (d) 18000
10. 10.Which is closest to 296 + 104 + 400? (a) 700 (b) 1000 (c) 900 (d) 800
11. 11.Which is closest to 802 + 900 + 396? (a) 2000 (b) 2200 (c) 2100 (d) 2300
12. 12.Round 26377 to the nearest ten.
13. 13.Which is closest to 901 × 88? (Round each number first.) (a) 8100 (b) 810000 (c) 81000 (d) 162000
14. 14.Which is closest to 801 + 96 + 597? (a) 1400 (b) 1500 (c) 1700 (d) 1600
15. 15.Which is closest to 296 × 80? (Round each number first.) (a) 2400 (b) 240000 (c) 48000 (d) 24000
16. 16.Round 80.77 to one decimal place. =
17. 17.Which is closest to 601 ÷ 29? (a) 10 (b) 20 (c) 200 (d) 40
18. 18.Which is closest to 899 + 495 + 197? (a) 1800 (b) 1500 (c) 1700 (d) 1600
19. 19.Which is closest to 797 + 403 + 104? (a) 1200 (b) 1500 (c) 1300 (d) 1400
20. 20.Which is closest to 802 + 204 + 103? (a) 1100 (b) 1000 (c) 1200 (d) 1300
21. 21.Which is closest to 196 × 20? (Round each number first.) (a) 8000 (b) 4000 (c) 400 (d) 40000
22. 22.Which is closest to 696 × 52? (Round each number first.) (a) 35000 (b) 70000 (c) 350000 (d) 3500
23. 23.Which is closest to 896 × 89? (Round each number first.) (a) 162000 (b) 8100 (c) 81000 (d) 810000
24. 24.Which is closest to 1601 ÷ 21? (a) 80 (b) 40 (c) 800 (d) 160
25. 25.Round 48929 to the nearest ten.
26. 26.Which is closest to 401 × 80? (Round each number first.) (a) 3200 (b) 64000 (c) 320000 (d) 32000
27. 27.Which is closest to 596 × 50? (Round each number first.) (a) 3000 (b) 300000 (c) 30000 (d) 60000
28. 28.Round 65640 to the nearest thousand.
29. 29.Round 11643 to the nearest ten.
30. 30.Round 42.66 to one decimal place. =
31. 31.Round 74.13 to one decimal place. =
32. 32.Round 63.47 to one decimal place. =
33. 33.Which is closest to 598 × 21? (Round each number first.) (a) 120000 (b) 1200 (c) 12000 (d) 24000
34. 34.Round 97.86 to one decimal place. =
35. 35.Which is closest to 598 × 31? (Round each number first.) (a) 1800 (b) 36000 (c) 18000 (d) 180000
36. 36.Which is closest to 203 × 49? (Round each number first.) (a) 100000 (b) 20000 (c) 1000 (d) 10000
37. 37.Which is closest to 699 × 58? (Round each number first.) (a) 84000 (b) 420000 (c) 42000 (d) 4200
38. 38.Which is closest to 802 ÷ 39? (a) 200 (b) 20 (c) 40 (d) 10
39. 39.Round 97361 to the nearest thousand.
40. 40.Which is closest to 801 × 70? (Round each number first.) (a) 56000 (b) 112000 (c) 5600 (d) 560000

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