Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 53 · 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 85096 to the nearest ten.
2. 2.Which is closest to 797 × 71? (Round each number first.) (a) 560000 (b) 112000 (c) 5600 (d) 56000
3. 3.Which is closest to 796 + 702 + 299? (a) 1700 (b) 1900 (c) 1800 (d) 2000
4. 4.Round 52.38 to one decimal place. =
5. 5.Which is closest to 800 × 88? (Round each number first.) (a) 72000 (b) 720000 (c) 7200 (d) 144000
6. 6.Which is closest to 504 + 301 + 705? (a) 1400 (b) 1500 (c) 1700 (d) 1600
7. 7.Round 96266 to the nearest thousand.
8. 8.Round 13.83 to one decimal place. =
9. 9.Which is closest to 296 × 19? (Round each number first.) (a) 12000 (b) 6000 (c) 60000 (d) 600
10. 10.Round 63.24 to one decimal place. =
11. 11.Which is closest to 404 × 22? (Round each number first.) (a) 16000 (b) 80000 (c) 8000 (d) 800
12. 12.Which is closest to 603 × 62? (Round each number first.) (a) 36000 (b) 72000 (c) 360000 (d) 3600
13. 13.Which is closest to 697 × 40? (Round each number first.) (a) 28000 (b) 56000 (c) 2800 (d) 280000
14. 14.Which is closest to 799 + 402 + 595? (a) 1700 (b) 1800 (c) 1900 (d) 2000
15. 15.Which is closest to 796 + 304 + 100? (a) 1300 (b) 1100 (c) 1400 (d) 1200
16. 16.Which is closest to 797 + 297 + 796? (a) 1800 (b) 1900 (c) 2100 (d) 2000
17. 17.Which is closest to 2805 ÷ 41? (a) 70 (b) 140 (c) 35 (d) 700
18. 18.Which is closest to 695 + 396 + 104? (a) 1400 (b) 1200 (c) 1100 (d) 1300
19. 19.Which is closest to 795 + 599 + 801? (a) 2300 (b) 2400 (c) 2200 (d) 2100
20. 20.Round 27.39 to one decimal place. =
21. 21.Round 93.37 to one decimal place. =
22. 22.Which is closest to 597 × 51? (Round each number first.) (a) 30000 (b) 3000 (c) 300000 (d) 60000
23. 23.Which is closest to 302 × 52? (Round each number first.) (a) 1500 (b) 30000 (c) 15000 (d) 150000
24. 24.Which is closest to 899 × 71? (Round each number first.) (a) 63000 (b) 126000 (c) 6300 (d) 630000
25. 25.Which is closest to 2003 ÷ 41? (a) 25 (b) 500 (c) 100 (d) 50
26. 26.Round 79.58 to one decimal place. =
27. 27.Which is closest to 900 + 801 + 797? (a) 2700 (b) 2600 (c) 2400 (d) 2500
28. 28.Which is closest to 298 + 703 + 398? (a) 1300 (b) 1600 (c) 1400 (d) 1500
29. 29.Which is closest to 898 + 803 + 499? (a) 2300 (b) 2400 (c) 2100 (d) 2200
30. 30.Round 69611 to the nearest ten.
31. 31.Which is closest to 302 + 100 + 200? (a) 600 (b) 700 (c) 500 (d) 800
32. 32.Round 67.83 to one decimal place. =
33. 33.Which is closest to 897 + 697 + 104? (a) 1800 (b) 1900 (c) 1700 (d) 1600
34. 34.Which is closest to 795 + 500 + 103? (a) 1500 (b) 1300 (c) 1400 (d) 1600
35. 35.Round 86.59 to one decimal place. =
36. 36.Which is closest to 201 × 90? (Round each number first.) (a) 18000 (b) 1800 (c) 36000 (d) 180000
37. 37.Round 62071 to the nearest ten.
38. 38.Which is closest to 3604 ÷ 41? (a) 45 (b) 180 (c) 90 (d) 900
39. 39.Which is closest to 600 + 103 + 199? (a) 1000 (b) 800 (c) 1100 (d) 900
40. 40.Round 15.43 to one decimal place. =

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