Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 395 · 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 896 + 100 + 597? (a) 1500 (b) 1800 (c) 1700 (d) 1600
2. 2.Which is closest to 99 + 797 + 605? (a) 1400 (b) 1600 (c) 1700 (d) 1500
3. 3.Which is closest to 101 + 697 + 595? (a) 1400 (b) 1500 (c) 1600 (d) 1300
4. 4.Which is closest to 2503 ÷ 51? (a) 100 (b) 500 (c) 25 (d) 50
5. 5.Round 27358 to the nearest hundred.
6. 6.Which is closest to 203 + 697 + 204? (a) 1100 (b) 1200 (c) 1000 (d) 1300
7. 7.Which is closest to 198 × 32? (Round each number first.) (a) 600 (b) 6000 (c) 60000 (d) 12000
8. 8.Round 36.16 to one decimal place. =
9. 9.Round 74563 to the nearest ten.
10. 10.Which is closest to 804 × 88? (Round each number first.) (a) 720000 (b) 7200 (c) 72000 (d) 144000
11. 11.Which is closest to 596 × 72? (Round each number first.) (a) 420000 (b) 42000 (c) 4200 (d) 84000
12. 12.Round 59.36 to one decimal place. =
13. 13.Which is closest to 401 × 69? (Round each number first.) (a) 56000 (b) 2800 (c) 280000 (d) 28000
14. 14.Round 11479 to the nearest thousand.
15. 15.Round 39.59 to one decimal place. =
16. 16.Which is closest to 499 × 79? (Round each number first.) (a) 40000 (b) 4000 (c) 80000 (d) 400000
17. 17.Round 94.17 to one decimal place. =
18. 18.Which is closest to 298 × 59? (Round each number first.) (a) 1800 (b) 180000 (c) 36000 (d) 18000
19. 19.Round 65598 to the nearest thousand.
20. 20.Which is closest to 303 + 898 + 595? (a) 1900 (b) 1800 (c) 1700 (d) 2000
21. 21.Which is closest to 303 × 62? (Round each number first.) (a) 1800 (b) 180000 (c) 36000 (d) 18000
22. 22.Which is closest to 197 × 58? (Round each number first.) (a) 24000 (b) 120000 (c) 12000 (d) 1200
23. 23.Round 81.31 to one decimal place. =
24. 24.Round 2728 to the nearest ten.
25. 25.Round 60.94 to one decimal place. =
26. 26.Round 12.19 to one decimal place. =
27. 27.Round 22.42 to one decimal place. =
28. 28.Which is closest to 803 × 69? (Round each number first.) (a) 560000 (b) 112000 (c) 56000 (d) 5600
29. 29.Which is closest to 3602 ÷ 39? (a) 45 (b) 180 (c) 90 (d) 900
30. 30.Round 90662 to the nearest thousand.
31. 31.Which is closest to 2796 ÷ 39? (a) 140 (b) 70 (c) 700 (d) 35
32. 32.Which is closest to 2691 ÷ 29? (a) 45 (b) 180 (c) 90 (d) 900
33. 33.Which is closest to 801 + 195 + 304? (a) 1300 (b) 1400 (c) 1200 (d) 1500
34. 34.Round 38286 to the nearest thousand.
35. 35.Which is closest to 397 + 803 + 705? (a) 2000 (b) 1900 (c) 1800 (d) 2100
36. 36.Round 22558 to the nearest ten.
37. 37.Which is closest to 300 × 39? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
38. 38.Which is closest to 200 × 68? (Round each number first.) (a) 28000 (b) 1400 (c) 14000 (d) 140000
39. 39.Round 75026 to the nearest ten.
40. 40.Round 63918 to the nearest ten.

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