Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 662 · 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 401 ÷ 19? (a) 200 (b) 40 (c) 20 (d) 10
2. 2.Which is closest to 498 + 595 + 203? (a) 1400 (b) 1200 (c) 1500 (d) 1300
3. 3.Which is closest to 395 + 504 + 403? (a) 1400 (b) 1300 (c) 1200 (d) 1500
4. 4.Round 55186 to the nearest ten.
5. 5.Round 77172 to the nearest hundred.
6. 6.Which is closest to 501 × 80? (Round each number first.) (a) 40000 (b) 400000 (c) 80000 (d) 4000
7. 7.Which is closest to 599 × 69? (Round each number first.) (a) 42000 (b) 4200 (c) 84000 (d) 420000
8. 8.Which is closest to 97 + 700 + 599? (a) 1400 (b) 1300 (c) 1600 (d) 1500
9. 9.Which is closest to 1391 ÷ 21? (a) 140 (b) 700 (c) 35 (d) 70
10. 10.Which is closest to 299 + 105 + 398? (a) 800 (b) 1000 (c) 900 (d) 700
11. 11.Which is closest to 97 + 698 + 295? (a) 1100 (b) 1300 (c) 1200 (d) 1000
12. 12.Which is closest to 399 × 50? (Round each number first.) (a) 2000 (b) 200000 (c) 20000 (d) 40000
13. 13.Which is closest to 804 × 81? (Round each number first.) (a) 64000 (b) 6400 (c) 640000 (d) 128000
14. 14.Which is closest to 2993 ÷ 51? (a) 120 (b) 30 (c) 60 (d) 600
15. 15.Which is closest to 695 + 596 + 500? (a) 1900 (b) 1700 (c) 2000 (d) 1800
16. 16.Which is closest to 95 + 795 + 795? (a) 1800 (b) 1700 (c) 1600 (d) 1900
17. 17.Which is closest to 3191 ÷ 41? (a) 40 (b) 80 (c) 160 (d) 800
18. 18.Round 77.17 to one decimal place. =
19. 19.Round 47401 to the nearest ten.
20. 20.Which is closest to 1992 ÷ 39? (a) 100 (b) 25 (c) 500 (d) 50
21. 21.Which is closest to 1203 ÷ 19? (a) 30 (b) 60 (c) 600 (d) 120
22. 22.Round 84.89 to one decimal place. =
23. 23.Round 17292 to the nearest ten.
24. 24.Which is closest to 404 × 29? (Round each number first.) (a) 1200 (b) 24000 (c) 12000 (d) 120000
25. 25.Round 71.58 to one decimal place. =
26. 26.Which is closest to 395 ÷ 19? (a) 40 (b) 20 (c) 10 (d) 200
27. 27.Which is closest to 200 × 29? (Round each number first.) (a) 600 (b) 12000 (c) 60000 (d) 6000
28. 28.Which is closest to 297 × 31? (Round each number first.) (a) 90000 (b) 900 (c) 9000 (d) 18000
29. 29.Which is closest to 503 × 38? (Round each number first.) (a) 200000 (b) 40000 (c) 20000 (d) 2000
30. 30.Round 95492 to the nearest thousand.
31. 31.Which is closest to 703 × 29? (Round each number first.) (a) 2100 (b) 21000 (c) 210000 (d) 42000
32. 32.Which is closest to 303 + 799 + 500? (a) 1500 (b) 1600 (c) 1800 (d) 1700
33. 33.Which is closest to 600 × 81? (Round each number first.) (a) 96000 (b) 480000 (c) 4800 (d) 48000
34. 34.Round 49.87 to one decimal place. =
35. 35.Which is closest to 701 × 51? (Round each number first.) (a) 3500 (b) 35000 (c) 350000 (d) 70000
36. 36.Which is closest to 602 × 31? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
37. 37.Which is closest to 596 × 50? (Round each number first.) (a) 60000 (b) 300000 (c) 30000 (d) 3000
38. 38.Which is closest to 801 × 60? (Round each number first.) (a) 4800 (b) 96000 (c) 480000 (d) 48000
39. 39.Round 18372 to the nearest ten.
40. 40.Which is closest to 2803 ÷ 41? (a) 70 (b) 700 (c) 140 (d) 35

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