Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 775 · 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 14.93 to one decimal place. =
2. 2.Which is closest to 401 + 904 + 301? (a) 1800 (b) 1500 (c) 1700 (d) 1600
3. 3.Round 80.84 to one decimal place. =
4. 4.Which is closest to 704 × 31? (Round each number first.) (a) 42000 (b) 210000 (c) 2100 (d) 21000
5. 5.Which is closest to 498 + 503 + 899? (a) 2000 (b) 1900 (c) 2100 (d) 1800
6. 6.Round 3131 to the nearest hundred.
7. 7.Which is closest to 803 + 101 + 296? (a) 1300 (b) 1100 (c) 1400 (d) 1200
8. 8.Which is closest to 405 + 895 + 197? (a) 1600 (b) 1700 (c) 1500 (d) 1400
9. 9.Which is closest to 504 × 22? (Round each number first.) (a) 10000 (b) 1000 (c) 100000 (d) 20000
10. 10.Which is closest to 798 × 48? (Round each number first.) (a) 40000 (b) 80000 (c) 4000 (d) 400000
11. 11.Which is closest to 296 × 49? (Round each number first.) (a) 150000 (b) 30000 (c) 15000 (d) 1500
12. 12.Which is closest to 704 × 21? (Round each number first.) (a) 140000 (b) 28000 (c) 14000 (d) 1400
13. 13.Which is closest to 803 × 72? (Round each number first.) (a) 5600 (b) 56000 (c) 112000 (d) 560000
14. 14.Round 22.69 to one decimal place. =
15. 15.Round 10418 to the nearest ten.
16. 16.Which is closest to 505 + 501 + 102? (a) 1300 (b) 1000 (c) 1100 (d) 1200
17. 17.Which is closest to 498 × 90? (Round each number first.) (a) 4500 (b) 90000 (c) 450000 (d) 45000
18. 18.Which is closest to 702 × 81? (Round each number first.) (a) 56000 (b) 5600 (c) 112000 (d) 560000
19. 19.Which is closest to 595 + 304 + 503? (a) 1500 (b) 1600 (c) 1300 (d) 1400
20. 20.Round 66104 to the nearest thousand.
21. 21.Round 80444 to the nearest ten.
22. 22.Which is closest to 797 + 195 + 801? (a) 1800 (b) 1900 (c) 2000 (d) 1700
23. 23.Which is closest to 202 × 41? (Round each number first.) (a) 800 (b) 8000 (c) 80000 (d) 16000
24. 24.Which is closest to 609 ÷ 31? (a) 20 (b) 10 (c) 40 (d) 200
25. 25.Which is closest to 601 × 90? (Round each number first.) (a) 5400 (b) 108000 (c) 540000 (d) 54000
26. 26.Which is closest to 899 × 78? (Round each number first.) (a) 72000 (b) 144000 (c) 720000 (d) 7200
27. 27.Which is closest to 994 ÷ 51? (a) 20 (b) 10 (c) 200 (d) 40
28. 28.Round 31236 to the nearest ten.
29. 29.Which is closest to 398 × 20? (Round each number first.) (a) 80000 (b) 800 (c) 8000 (d) 16000
30. 30.Round 12402 to the nearest hundred.
31. 31.Which is closest to 600 × 69? (Round each number first.) (a) 42000 (b) 420000 (c) 84000 (d) 4200
32. 32.Round 77984 to the nearest ten.
33. 33.Round 96.46 to one decimal place. =
34. 34.Round 61349 to the nearest hundred.
35. 35.Which is closest to 396 × 40? (Round each number first.) (a) 16000 (b) 1600 (c) 160000 (d) 32000
36. 36.Which is closest to 1505 ÷ 49? (a) 300 (b) 30 (c) 60 (d) 15
37. 37.Round 42399 to the nearest ten.
38. 38.Which is closest to 1592 ÷ 41? (a) 40 (b) 20 (c) 80 (d) 400
39. 39.Which is closest to 103 + 100 + 202? (a) 500 (b) 600 (c) 400 (d) 300
40. 40.Which is closest to 695 + 897 + 397? (a) 2000 (b) 2200 (c) 1900 (d) 2100

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