Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 577 · 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 77575 to the nearest hundred.
2. 2.Round 56.42 to one decimal place. =
3. 3.Which is closest to 399 × 21? (Round each number first.) (a) 16000 (b) 8000 (c) 800 (d) 80000
4. 4.Which is closest to 204 × 90? (Round each number first.) (a) 1800 (b) 180000 (c) 18000 (d) 36000
5. 5.Round 87148 to the nearest hundred.
6. 6.Round 54619 to the nearest ten.
7. 7.Which is closest to 195 + 800 + 597? (a) 1700 (b) 1600 (c) 1800 (d) 1500
8. 8.Which is closest to 401 × 30? (Round each number first.) (a) 1200 (b) 12000 (c) 24000 (d) 120000
9. 9.Round 41440 to the nearest hundred.
10. 10.Which is closest to 896 × 78? (Round each number first.) (a) 144000 (b) 72000 (c) 7200 (d) 720000
11. 11.Which is closest to 991 ÷ 49? (a) 40 (b) 20 (c) 10 (d) 200
12. 12.Which is closest to 903 × 51? (Round each number first.) (a) 450000 (b) 45000 (c) 4500 (d) 90000
13. 13.Which is closest to 104 + 302 + 903? (a) 1500 (b) 1200 (c) 1400 (d) 1300
14. 14.Round 16092 to the nearest thousand.
15. 15.Which is closest to 3506 ÷ 49? (a) 140 (b) 700 (c) 35 (d) 70
16. 16.Which is closest to 1205 ÷ 39? (a) 60 (b) 15 (c) 30 (d) 300
17. 17.Which is closest to 2001 ÷ 49? (a) 400 (b) 80 (c) 20 (d) 40
18. 18.Which is closest to 597 + 398 + 696? (a) 1700 (b) 1600 (c) 1800 (d) 1900
19. 19.Which is closest to 696 × 70? (Round each number first.) (a) 98000 (b) 4900 (c) 490000 (d) 49000
20. 20.Which is closest to 497 × 61? (Round each number first.) (a) 60000 (b) 300000 (c) 3000 (d) 30000
21. 21.Which is closest to 797 ÷ 19? (a) 20 (b) 80 (c) 40 (d) 400
22. 22.Which is closest to 700 × 28? (Round each number first.) (a) 2100 (b) 42000 (c) 21000 (d) 210000
23. 23.Round 82789 to the nearest ten.
24. 24.Which is closest to 500 + 897 + 204? (a) 1800 (b) 1500 (c) 1600 (d) 1700
25. 25.Which is closest to 901 + 800 + 795? (a) 2600 (b) 2700 (c) 2400 (d) 2500
26. 26.Which is closest to 803 + 195 + 704? (a) 1800 (b) 1600 (c) 1900 (d) 1700
27. 27.Round 59607 to the nearest thousand.
28. 28.Which is closest to 898 × 78? (Round each number first.) (a) 72000 (b) 720000 (c) 7200 (d) 144000
29. 29.Which is closest to 1801 ÷ 31? (a) 600 (b) 60 (c) 120 (d) 30
30. 30.Which is closest to 899 × 82? (Round each number first.) (a) 720000 (b) 7200 (c) 72000 (d) 144000
31. 31.Which is closest to 898 + 204 + 705? (a) 2000 (b) 1800 (c) 1900 (d) 1700
32. 32.Which is closest to 497 × 42? (Round each number first.) (a) 2000 (b) 200000 (c) 40000 (d) 20000
33. 33.Round 54122 to the nearest ten.
34. 34.Round 28331 to the nearest hundred.
35. 35.Which is closest to 296 × 22? (Round each number first.) (a) 60000 (b) 12000 (c) 6000 (d) 600
36. 36.Round 70.69 to one decimal place. =
37. 37.Round 52.12 to one decimal place. =
38. 38.Round 38.53 to one decimal place. =
39. 39.Which is closest to 302 + 96 + 799? (a) 1300 (b) 1400 (c) 1100 (d) 1200
40. 40.Which is closest to 902 × 71? (Round each number first.) (a) 126000 (b) 63000 (c) 630000 (d) 6300

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