Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 871 · 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 57.63 to one decimal place. =
2. 2.Which is closest to 300 + 297 + 697? (a) 1300 (b) 1200 (c) 1400 (d) 1500
3. 3.Round 52400 to the nearest thousand.
4. 4.Which is closest to 797 × 32? (Round each number first.) (a) 240000 (b) 48000 (c) 24000 (d) 2400
5. 5.Which is closest to 198 × 20? (Round each number first.) (a) 4000 (b) 400 (c) 8000 (d) 40000
6. 6.Round 81435 to the nearest hundred.
7. 7.Which is closest to 603 × 70? (Round each number first.) (a) 4200 (b) 84000 (c) 42000 (d) 420000
8. 8.Round 54512 to the nearest thousand.
9. 9.Which is closest to 3000 ÷ 51? (a) 600 (b) 120 (c) 30 (d) 60
10. 10.Round 11368 to the nearest hundred.
11. 11.Round 54126 to the nearest thousand.
12. 12.Which is closest to 796 × 31? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
13. 13.Which is closest to 1008 ÷ 19? (a) 500 (b) 100 (c) 50 (d) 25
14. 14.Round 98048 to the nearest hundred.
15. 15.Which is closest to 800 × 78? (Round each number first.) (a) 6400 (b) 128000 (c) 640000 (d) 64000
16. 16.Which is closest to 200 + 503 + 405? (a) 1300 (b) 1200 (c) 1000 (d) 1100
17. 17.Which is closest to 2809 ÷ 41? (a) 700 (b) 35 (c) 70 (d) 140
18. 18.Which is closest to 603 + 202 + 799? (a) 1700 (b) 1600 (c) 1500 (d) 1800
19. 19.Which is closest to 803 × 41? (Round each number first.) (a) 64000 (b) 320000 (c) 3200 (d) 32000
20. 20.Round 72.48 to one decimal place. =
21. 21.Which is closest to 2096 ÷ 29? (a) 140 (b) 70 (c) 700 (d) 35
22. 22.Which is closest to 703 × 48? (Round each number first.) (a) 70000 (b) 3500 (c) 35000 (d) 350000
23. 23.Which is closest to 202 × 18? (Round each number first.) (a) 400 (b) 4000 (c) 8000 (d) 40000
24. 24.Which is closest to 301 × 68? (Round each number first.) (a) 2100 (b) 21000 (c) 210000 (d) 42000
25. 25.Which is closest to 2504 ÷ 49? (a) 500 (b) 100 (c) 25 (d) 50
26. 26.Which is closest to 204 × 81? (Round each number first.) (a) 16000 (b) 1600 (c) 32000 (d) 160000
27. 27.Which is closest to 398 × 68? (Round each number first.) (a) 28000 (b) 2800 (c) 56000 (d) 280000
28. 28.Round 75993 to the nearest hundred.
29. 29.Which is closest to 204 × 88? (Round each number first.) (a) 18000 (b) 36000 (c) 180000 (d) 1800
30. 30.Which is closest to 297 × 89? (Round each number first.) (a) 270000 (b) 54000 (c) 2700 (d) 27000
31. 31.Which is closest to 499 × 48? (Round each number first.) (a) 250000 (b) 2500 (c) 50000 (d) 25000
32. 32.Round 92537 to the nearest thousand.
33. 33.Which is closest to 798 × 31? (Round each number first.) (a) 48000 (b) 24000 (c) 240000 (d) 2400
34. 34.Round 63597 to the nearest thousand.
35. 35.Round 39.54 to one decimal place. =
36. 36.Round 36564 to the nearest hundred.
37. 37.Which is closest to 2505 ÷ 49? (a) 500 (b) 25 (c) 100 (d) 50
38. 38.Which is closest to 301 × 32? (Round each number first.) (a) 90000 (b) 900 (c) 9000 (d) 18000
39. 39.Which is closest to 398 + 96 + 98? (a) 700 (b) 500 (c) 800 (d) 600
40. 40.Round 92.76 to one decimal place. =

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