Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 583 · 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 38296 to the nearest hundred.
2. 2.Which is closest to 704 × 22? (Round each number first.) (a) 14000 (b) 1400 (c) 28000 (d) 140000
3. 3.Round 52284 to the nearest thousand.
4. 4.Which is closest to 2799 ÷ 41? (a) 35 (b) 70 (c) 140 (d) 700
5. 5.Round 76.33 to one decimal place. =
6. 6.Which is closest to 801 + 797 + 302? (a) 2000 (b) 2100 (c) 1800 (d) 1900
7. 7.Which is closest to 299 × 88? (Round each number first.) (a) 2700 (b) 27000 (c) 270000 (d) 54000
8. 8.Round 45518 to the nearest thousand.
9. 9.Round 72832 to the nearest hundred.
10. 10.Which is closest to 401 × 41? (Round each number first.) (a) 32000 (b) 16000 (c) 1600 (d) 160000
11. 11.Round 87948 to the nearest ten.
12. 12.Round 23913 to the nearest thousand.
13. 13.Which is closest to 801 + 597 + 902? (a) 2200 (b) 2300 (c) 2500 (d) 2400
14. 14.Round 84.36 to one decimal place. =
15. 15.Which is closest to 500 × 29? (Round each number first.) (a) 1500 (b) 15000 (c) 30000 (d) 150000
16. 16.Which is closest to 401 ÷ 21? (a) 40 (b) 200 (c) 10 (d) 20
17. 17.Which is closest to 204 × 48? (Round each number first.) (a) 1000 (b) 10000 (c) 100000 (d) 20000
18. 18.Which is closest to 195 + 103 + 804? (a) 1100 (b) 1300 (c) 1200 (d) 1000
19. 19.Round 13514 to the nearest ten.
20. 20.Which is closest to 498 × 79? (Round each number first.) (a) 4000 (b) 40000 (c) 400000 (d) 80000
21. 21.Which is closest to 502 × 91? (Round each number first.) (a) 90000 (b) 45000 (c) 4500 (d) 450000
22. 22.Which is closest to 197 × 78? (Round each number first.) (a) 160000 (b) 1600 (c) 32000 (d) 16000
23. 23.Which is closest to 100 + 298 + 895? (a) 1500 (b) 1200 (c) 1300 (d) 1400
24. 24.Round 18230 to the nearest thousand.
25. 25.Which is closest to 200 × 51? (Round each number first.) (a) 10000 (b) 1000 (c) 100000 (d) 20000
26. 26.Which is closest to 798 × 59? (Round each number first.) (a) 96000 (b) 48000 (c) 480000 (d) 4800
27. 27.Round 20.88 to one decimal place. =
28. 28.Which is closest to 703 × 41? (Round each number first.) (a) 280000 (b) 56000 (c) 28000 (d) 2800
29. 29.Which is closest to 601 × 88? (Round each number first.) (a) 54000 (b) 540000 (c) 108000 (d) 5400
30. 30.Which is closest to 504 + 705 + 597? (a) 1700 (b) 2000 (c) 1800 (d) 1900
31. 31.Which is closest to 202 + 305 + 799? (a) 1500 (b) 1200 (c) 1300 (d) 1400
32. 32.Round 60206 to the nearest hundred.
33. 33.Which is closest to 807 ÷ 19? (a) 20 (b) 40 (c) 400 (d) 80
34. 34.Round 63.93 to one decimal place. =
35. 35.Which is closest to 401 + 199 + 901? (a) 1400 (b) 1700 (c) 1600 (d) 1500
36. 36.Which is closest to 596 + 205 + 496? (a) 1500 (b) 1300 (c) 1400 (d) 1200
37. 37.Which is closest to 401 × 20? (Round each number first.) (a) 16000 (b) 8000 (c) 80000 (d) 800
38. 38.Which is closest to 1197 ÷ 31? (a) 20 (b) 80 (c) 40 (d) 400
39. 39.Which is closest to 403 + 97 + 898? (a) 1400 (b) 1300 (c) 1600 (d) 1500
40. 40.Round 41.56 to one decimal place. =

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