Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 475 · 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 795 ÷ 41? (a) 20 (b) 200 (c) 40 (d) 10
2. 2.Which is closest to 203 + 804 + 595? (a) 1500 (b) 1700 (c) 1800 (d) 1600
3. 3.Which is closest to 898 + 803 + 802? (a) 2400 (b) 2700 (c) 2500 (d) 2600
4. 4.Round 97614 to the nearest hundred.
5. 5.Round 56.53 to one decimal place. =
6. 6.Which is closest to 896 × 88? (Round each number first.) (a) 162000 (b) 81000 (c) 810000 (d) 8100
7. 7.Round 85721 to the nearest hundred.
8. 8.Which is closest to 501 × 50? (Round each number first.) (a) 2500 (b) 50000 (c) 25000 (d) 250000
9. 9.Round 36.48 to one decimal place. =
10. 10.Which is closest to 1500 ÷ 51? (a) 300 (b) 60 (c) 30 (d) 15
11. 11.Which is closest to 697 × 79? (Round each number first.) (a) 5600 (b) 112000 (c) 56000 (d) 560000
12. 12.Which is closest to 698 + 895 + 699? (a) 2500 (b) 2400 (c) 2300 (d) 2200
13. 13.Which is closest to 905 + 200 + 104? (a) 1300 (b) 1100 (c) 1400 (d) 1200
14. 14.Which is closest to 898 × 48? (Round each number first.) (a) 90000 (b) 4500 (c) 450000 (d) 45000
15. 15.Which is closest to 895 + 697 + 96? (a) 1800 (b) 1700 (c) 1900 (d) 1600
16. 16.Which is closest to 304 × 71? (Round each number first.) (a) 2100 (b) 42000 (c) 21000 (d) 210000
17. 17.Which is closest to 301 × 40? (Round each number first.) (a) 120000 (b) 12000 (c) 1200 (d) 24000
18. 18.Round 25289 to the nearest ten.
19. 19.Which is closest to 697 × 50? (Round each number first.) (a) 3500 (b) 70000 (c) 35000 (d) 350000
20. 20.Which is closest to 501 × 42? (Round each number first.) (a) 2000 (b) 40000 (c) 20000 (d) 200000
21. 21.Round 42.73 to one decimal place. =
22. 22.Which is closest to 2991 ÷ 49? (a) 30 (b) 60 (c) 120 (d) 600
23. 23.Round 44682 to the nearest ten.
24. 24.Which is closest to 899 + 200 + 500? (a) 1600 (b) 1800 (c) 1500 (d) 1700
25. 25.Which is closest to 802 + 495 + 198? (a) 1600 (b) 1400 (c) 1700 (d) 1500
26. 26.Round 79.33 to one decimal place. =
27. 27.Which is closest to 1191 ÷ 29? (a) 80 (b) 400 (c) 20 (d) 40
28. 28.Which is closest to 498 × 48? (Round each number first.) (a) 250000 (b) 2500 (c) 25000 (d) 50000
29. 29.Which is closest to 101 + 96 + 501? (a) 900 (b) 700 (c) 600 (d) 800
30. 30.Which is closest to 399 × 59? (Round each number first.) (a) 24000 (b) 240000 (c) 2400 (d) 48000
31. 31.Round 52.51 to one decimal place. =
32. 32.Round 86.11 to one decimal place. =
33. 33.Which is closest to 797 × 68? (Round each number first.) (a) 5600 (b) 560000 (c) 56000 (d) 112000
34. 34.Which is closest to 497 + 105 + 799? (a) 1500 (b) 1600 (c) 1400 (d) 1300
35. 35.Which is closest to 399 × 32? (Round each number first.) (a) 12000 (b) 1200 (c) 120000 (d) 24000
36. 36.Which is closest to 301 × 22? (Round each number first.) (a) 60000 (b) 6000 (c) 600 (d) 12000
37. 37.Which is closest to 602 + 696 + 600? (a) 2000 (b) 1900 (c) 2100 (d) 1800
38. 38.Round 43220 to the nearest hundred.
39. 39.Which is closest to 601 × 79? (Round each number first.) (a) 4800 (b) 96000 (c) 480000 (d) 48000
40. 40.Which is closest to 300 + 304 + 897? (a) 1400 (b) 1700 (c) 1500 (d) 1600

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