Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 107 · 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 58.47 to one decimal place. =
2. 2.Which is closest to 302 + 202 + 895? (a) 1500 (b) 1400 (c) 1600 (d) 1300
3. 3.Which is closest to 398 × 72? (Round each number first.) (a) 2800 (b) 28000 (c) 56000 (d) 280000
4. 4.Which is closest to 796 + 99 + 395? (a) 1300 (b) 1400 (c) 1500 (d) 1200
5. 5.Round 24.26 to one decimal place. =
6. 6.Round 13579 to the nearest thousand.
7. 7.Which is closest to 397 + 602 + 200? (a) 1400 (b) 1100 (c) 1300 (d) 1200
8. 8.Which is closest to 403 × 88? (Round each number first.) (a) 72000 (b) 360000 (c) 3600 (d) 36000
9. 9.Which is closest to 298 × 38? (Round each number first.) (a) 1200 (b) 24000 (c) 120000 (d) 12000
10. 10.Round 61066 to the nearest hundred.
11. 11.Round 32976 to the nearest hundred.
12. 12.Round 69431 to the nearest thousand.
13. 13.Round 11.66 to one decimal place. =
14. 14.Which is closest to 202 + 401 + 99? (a) 600 (b) 800 (c) 900 (d) 700
15. 15.Round 2092 to the nearest hundred.
16. 16.Which is closest to 199 × 20? (Round each number first.) (a) 40000 (b) 400 (c) 8000 (d) 4000
17. 17.Which is closest to 201 × 60? (Round each number first.) (a) 1200 (b) 12000 (c) 120000 (d) 24000
18. 18.Round 82826 to the nearest thousand.
19. 19.Round 34.41 to one decimal place. =
20. 20.Which is closest to 200 × 82? (Round each number first.) (a) 16000 (b) 1600 (c) 160000 (d) 32000
21. 21.Which is closest to 499 × 32? (Round each number first.) (a) 1500 (b) 150000 (c) 15000 (d) 30000
22. 22.Which is closest to 798 + 395 + 895? (a) 2300 (b) 2200 (c) 2100 (d) 2000
23. 23.Which is closest to 2799 ÷ 39? (a) 140 (b) 35 (c) 700 (d) 70
24. 24.Which is closest to 898 × 39? (Round each number first.) (a) 3600 (b) 360000 (c) 72000 (d) 36000
25. 25.Round 20153 to the nearest thousand.
26. 26.Which is closest to 1192 ÷ 31? (a) 80 (b) 400 (c) 20 (d) 40
27. 27.Round 79.52 to one decimal place. =
28. 28.Which is closest to 696 × 59? (Round each number first.) (a) 84000 (b) 420000 (c) 42000 (d) 4200
29. 29.Which is closest to 796 × 18? (Round each number first.) (a) 160000 (b) 16000 (c) 1600 (d) 32000
30. 30.Round 45332 to the nearest thousand.
31. 31.Which is closest to 203 × 48? (Round each number first.) (a) 100000 (b) 1000 (c) 20000 (d) 10000
32. 32.Round 70.44 to one decimal place. =
33. 33.Round 50553 to the nearest thousand.
34. 34.Round 45886 to the nearest hundred.
35. 35.Which is closest to 899 × 62? (Round each number first.) (a) 540000 (b) 108000 (c) 5400 (d) 54000
36. 36.Which is closest to 198 × 19? (Round each number first.) (a) 40000 (b) 400 (c) 4000 (d) 8000
37. 37.Round 58.79 to one decimal place. =
38. 38.Round 66501 to the nearest thousand.
39. 39.Which is closest to 600 + 799 + 496? (a) 2000 (b) 2100 (c) 1800 (d) 1900
40. 40.Which is closest to 497 + 297 + 605? (a) 1400 (b) 1600 (c) 1500 (d) 1300

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