Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 96 · 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 197 + 199 + 895? (a) 1200 (b) 1400 (c) 1300 (d) 1500
2. 2.Round 79.56 to one decimal place. =
3. 3.Which is closest to 197 × 81? (Round each number first.) (a) 1600 (b) 16000 (c) 160000 (d) 32000
4. 4.Which is closest to 696 + 97 + 903? (a) 1600 (b) 1800 (c) 1700 (d) 1900
5. 5.Which is closest to 900 + 900 + 905? (a) 2800 (b) 2600 (c) 2700 (d) 2900
6. 6.Which is closest to 296 + 198 + 801? (a) 1500 (b) 1400 (c) 1300 (d) 1200
7. 7.Which is closest to 696 + 304 + 905? (a) 1900 (b) 2000 (c) 1800 (d) 2100
8. 8.Which is closest to 604 × 48? (Round each number first.) (a) 3000 (b) 300000 (c) 60000 (d) 30000
9. 9.Round 62442 to the nearest thousand.
10. 10.Which is closest to 902 × 51? (Round each number first.) (a) 4500 (b) 450000 (c) 90000 (d) 45000
11. 11.Which is closest to 600 + 495 + 800? (a) 1900 (b) 2100 (c) 2000 (d) 1800
12. 12.Which is closest to 100 + 297 + 895? (a) 1200 (b) 1300 (c) 1500 (d) 1400
13. 13.Round 99063 to the nearest ten.
14. 14.Which is closest to 1002 ÷ 51? (a) 200 (b) 10 (c) 20 (d) 40
15. 15.Which is closest to 197 × 49? (Round each number first.) (a) 100000 (b) 10000 (c) 1000 (d) 20000
16. 16.Which is closest to 302 × 89? (Round each number first.) (a) 27000 (b) 54000 (c) 270000 (d) 2700
17. 17.Which is closest to 202 × 91? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
18. 18.Which is closest to 701 × 39? (Round each number first.) (a) 28000 (b) 2800 (c) 56000 (d) 280000
19. 19.Which is closest to 802 × 32? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
20. 20.Round 97267 to the nearest thousand.
21. 21.Round 33746 to the nearest ten.
22. 22.Which is closest to 304 + 301 + 702? (a) 1300 (b) 1500 (c) 1200 (d) 1400
23. 23.Which is closest to 503 × 89? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
24. 24.Round 56.11 to one decimal place. =
25. 25.Which is closest to 801 + 897 + 198? (a) 1900 (b) 2000 (c) 1800 (d) 2100
26. 26.Which is closest to 696 × 19? (Round each number first.) (a) 28000 (b) 1400 (c) 140000 (d) 14000
27. 27.Round 67.44 to one decimal place. =
28. 28.Round 39.41 to one decimal place. =
29. 29.Round 40923 to the nearest thousand.
30. 30.Round 93.34 to one decimal place. =
31. 31.Round 60232 to the nearest ten.
32. 32.Round 33.06 to one decimal place. =
33. 33.Round 18346 to the nearest ten.
34. 34.Round 76.87 to one decimal place. =
35. 35.Round 63697 to the nearest hundred.
36. 36.Which is closest to 696 + 305 + 100? (a) 1200 (b) 1100 (c) 1300 (d) 1000
37. 37.Round 79.17 to one decimal place. =
38. 38.Round 71.69 to one decimal place. =
39. 39.Round 79.21 to one decimal place. =
40. 40.Which is closest to 501 × 20? (Round each number first.) (a) 1000 (b) 20000 (c) 10000 (d) 100000

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