Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 729 · 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 799 + 299 + 297? (a) 1300 (b) 1500 (c) 1400 (d) 1600
2. 2.Which is closest to 597 ÷ 19? (a) 15 (b) 300 (c) 60 (d) 30
3. 3.Which is closest to 597 × 52? (Round each number first.) (a) 3000 (b) 30000 (c) 60000 (d) 300000
4. 4.Which is closest to 2694 ÷ 29? (a) 900 (b) 180 (c) 45 (d) 90
5. 5.Which is closest to 700 × 58? (Round each number first.) (a) 420000 (b) 4200 (c) 84000 (d) 42000
6. 6.Which is closest to 603 × 29? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
7. 7.Round 76.76 to one decimal place. =
8. 8.Which is closest to 902 × 48? (Round each number first.) (a) 90000 (b) 4500 (c) 45000 (d) 450000
9. 9.Round 77.23 to one decimal place. =
10. 10.Round 19.52 to one decimal place. =
11. 11.Round 64018 to the nearest hundred.
12. 12.Which is closest to 196 + 295 + 302? (a) 700 (b) 1000 (c) 900 (d) 800
13. 13.Which is closest to 395 + 803 + 195? (a) 1500 (b) 1400 (c) 1600 (d) 1300
14. 14.Round 88.24 to one decimal place. =
15. 15.Which is closest to 902 + 104 + 503? (a) 1400 (b) 1500 (c) 1700 (d) 1600
16. 16.Round 74158 to the nearest ten.
17. 17.Round 51.11 to one decimal place. =
18. 18.Which is closest to 902 + 297 + 95? (a) 1500 (b) 1400 (c) 1200 (d) 1300
19. 19.Which is closest to 499 × 68? (Round each number first.) (a) 350000 (b) 70000 (c) 35000 (d) 3500
20. 20.Which is closest to 597 × 78? (Round each number first.) (a) 480000 (b) 4800 (c) 96000 (d) 48000
21. 21.Round 64611 to the nearest hundred.
22. 22.Round 63867 to the nearest thousand.
23. 23.Which is closest to 898 × 41? (Round each number first.) (a) 360000 (b) 72000 (c) 3600 (d) 36000
24. 24.Which is closest to 98 + 398 + 699? (a) 1200 (b) 1100 (c) 1400 (d) 1300
25. 25.Which is closest to 2695 ÷ 29? (a) 180 (b) 45 (c) 900 (d) 90
26. 26.Round 18836 to the nearest ten.
27. 27.Which is closest to 603 × 92? (Round each number first.) (a) 108000 (b) 5400 (c) 54000 (d) 540000
28. 28.Round 30836 to the nearest thousand.
29. 29.Which is closest to 797 + 97 + 398? (a) 1300 (b) 1200 (c) 1400 (d) 1500
30. 30.Round 1880 to the nearest thousand.
31. 31.Round 10207 to the nearest thousand.
32. 32.Which is closest to 498 × 39? (Round each number first.) (a) 40000 (b) 200000 (c) 2000 (d) 20000
33. 33.Which is closest to 496 + 398 + 799? (a) 1800 (b) 1600 (c) 1700 (d) 1900
34. 34.Round 97.58 to one decimal place. =
35. 35.Round 40422 to the nearest hundred.
36. 36.Which is closest to 4493 ÷ 51? (a) 45 (b) 900 (c) 180 (d) 90
37. 37.Round 68624 to the nearest ten.
38. 38.Round 59.78 to one decimal place. =
39. 39.Round 17.54 to one decimal place. =
40. 40.Round 98267 to the nearest hundred.

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