Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 143 · 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 298 + 303 + 404? (a) 1100 (b) 900 (c) 1200 (d) 1000
2. 2.Which is closest to 792 ÷ 39? (a) 40 (b) 20 (c) 10 (d) 200
3. 3.Which is closest to 604 × 19? (Round each number first.) (a) 120000 (b) 1200 (c) 12000 (d) 24000
4. 4.Round 23.36 to one decimal place. =
5. 5.Which is closest to 3598 ÷ 41? (a) 45 (b) 180 (c) 900 (d) 90
6. 6.Round 12832 to the nearest hundred.
7. 7.Round 55.61 to one decimal place. =
8. 8.Round 85161 to the nearest thousand.
9. 9.Which is closest to 602 × 29? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
10. 10.Round 82404 to the nearest ten.
11. 11.Which is closest to 403 × 61? (Round each number first.) (a) 240000 (b) 24000 (c) 48000 (d) 2400
12. 12.Round 74345 to the nearest thousand.
13. 13.Which is closest to 100 + 405 + 97? (a) 500 (b) 700 (c) 600 (d) 800
14. 14.Round 88884 to the nearest thousand.
15. 15.Round 22.06 to one decimal place. =
16. 16.Which is closest to 1207 ÷ 29? (a) 40 (b) 20 (c) 80 (d) 400
17. 17.Which is closest to 300 + 898 + 896? (a) 2100 (b) 2300 (c) 2200 (d) 2000
18. 18.Round 48721 to the nearest thousand.
19. 19.Which is closest to 301 × 22? (Round each number first.) (a) 60000 (b) 600 (c) 6000 (d) 12000
20. 20.Round 40.06 to one decimal place. =
21. 21.Round 51566 to the nearest thousand.
22. 22.Round 71047 to the nearest ten.
23. 23.Which is closest to 1193 ÷ 29? (a) 20 (b) 400 (c) 40 (d) 80
24. 24.Round 68.18 to one decimal place. =
25. 25.Which is closest to 701 × 79? (Round each number first.) (a) 112000 (b) 56000 (c) 5600 (d) 560000
26. 26.Which is closest to 1807 ÷ 19? (a) 45 (b) 180 (c) 900 (d) 90
27. 27.Which is closest to 797 × 29? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
28. 28.Which is closest to 704 × 42? (Round each number first.) (a) 2800 (b) 280000 (c) 56000 (d) 28000
29. 29.Which is closest to 902 + 603 + 496? (a) 2100 (b) 2000 (c) 1900 (d) 2200
30. 30.Which is closest to 797 + 399 + 898? (a) 2100 (b) 2000 (c) 2300 (d) 2200
31. 31.Which is closest to 204 × 18? (Round each number first.) (a) 400 (b) 4000 (c) 40000 (d) 8000
32. 32.Round 58750 to the nearest thousand.
33. 33.Which is closest to 597 + 405 + 495? (a) 1500 (b) 1600 (c) 1400 (d) 1700
34. 34.Which is closest to 504 × 52? (Round each number first.) (a) 2500 (b) 250000 (c) 25000 (d) 50000
35. 35.Which is closest to 295 + 296 + 201? (a) 700 (b) 1000 (c) 900 (d) 800
36. 36.Round 36.42 to one decimal place. =
37. 37.Round 32.77 to one decimal place. =
38. 38.Round 4819 to the nearest thousand.
39. 39.Which is closest to 597 × 18? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
40. 40.Which is closest to 100 + 695 + 199? (a) 1000 (b) 1100 (c) 1200 (d) 900

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