Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 460 · 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 2703 ÷ 31? (a) 90 (b) 180 (c) 900 (d) 45
2. 2.Round 16557 to the nearest ten.
3. 3.Which is closest to 699 + 301 + 105? (a) 1000 (b) 1200 (c) 1100 (d) 1300
4. 4.Round 25353 to the nearest ten.
5. 5.Round 5010 to the nearest thousand.
6. 6.Round 75882 to the nearest ten.
7. 7.Round 95.59 to one decimal place. =
8. 8.Which is closest to 799 × 79? (Round each number first.) (a) 128000 (b) 64000 (c) 640000 (d) 6400
9. 9.Which is closest to 4501 ÷ 51? (a) 180 (b) 900 (c) 90 (d) 45
10. 10.Round 16467 to the nearest thousand.
11. 11.Which is closest to 897 × 18? (Round each number first.) (a) 1800 (b) 180000 (c) 18000 (d) 36000
12. 12.Which is closest to 802 ÷ 19? (a) 80 (b) 400 (c) 20 (d) 40
13. 13.Which is closest to 105 + 804 + 895? (a) 1900 (b) 1800 (c) 2000 (d) 1700
14. 14.Which is closest to 398 × 42? (Round each number first.) (a) 1600 (b) 160000 (c) 16000 (d) 32000
15. 15.Which is closest to 398 × 51? (Round each number first.) (a) 20000 (b) 2000 (c) 40000 (d) 200000
16. 16.Round 55719 to the nearest ten.
17. 17.Round 26.34 to one decimal place. =
18. 18.Which is closest to 796 × 68? (Round each number first.) (a) 56000 (b) 112000 (c) 5600 (d) 560000
19. 19.Which is closest to 301 × 30? (Round each number first.) (a) 900 (b) 90000 (c) 18000 (d) 9000
20. 20.Which is closest to 902 + 399 + 98? (a) 1400 (b) 1500 (c) 1600 (d) 1300
21. 21.Round 24085 to the nearest hundred.
22. 22.Round 72412 to the nearest ten.
23. 23.Round 14467 to the nearest thousand.
24. 24.Round 47.08 to one decimal place. =
25. 25.Round 89325 to the nearest thousand.
26. 26.Round 13.69 to one decimal place. =
27. 27.Which is closest to 797 × 58? (Round each number first.) (a) 96000 (b) 48000 (c) 4800 (d) 480000
28. 28.Which is closest to 203 × 29? (Round each number first.) (a) 12000 (b) 6000 (c) 600 (d) 60000
29. 29.Round 68535 to the nearest hundred.
30. 30.Which is closest to 498 × 80? (Round each number first.) (a) 80000 (b) 400000 (c) 40000 (d) 4000
31. 31.Which is closest to 298 × 81? (Round each number first.) (a) 48000 (b) 2400 (c) 240000 (d) 24000
32. 32.Round 62.09 to one decimal place. =
33. 33.Which is closest to 301 × 80? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
34. 34.Which is closest to 402 × 18? (Round each number first.) (a) 8000 (b) 16000 (c) 80000 (d) 800
35. 35.Which is closest to 1800 ÷ 21? (a) 90 (b) 900 (c) 180 (d) 45
36. 36.Which is closest to 697 × 58? (Round each number first.) (a) 4200 (b) 42000 (c) 84000 (d) 420000
37. 37.Round 7576 to the nearest thousand.
38. 38.Which is closest to 798 × 52? (Round each number first.) (a) 40000 (b) 80000 (c) 400000 (d) 4000
39. 39.Round 28.36 to one decimal place. =
40. 40.Which is closest to 1993 ÷ 51? (a) 20 (b) 40 (c) 80 (d) 400

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