Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 355 · 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 801 + 205 + 604? (a) 1700 (b) 1800 (c) 1600 (d) 1500
2. 2.Which is closest to 402 + 297 + 897? (a) 1500 (b) 1800 (c) 1700 (d) 1600
3. 3.Which is closest to 204 × 71? (Round each number first.) (a) 14000 (b) 1400 (c) 140000 (d) 28000
4. 4.Which is closest to 3192 ÷ 39? (a) 800 (b) 40 (c) 80 (d) 160
5. 5.Which is closest to 700 + 595 + 397? (a) 1900 (b) 1700 (c) 1600 (d) 1800
6. 6.Which is closest to 697 × 52? (Round each number first.) (a) 350000 (b) 35000 (c) 3500 (d) 70000
7. 7.Round 53874 to the nearest thousand.
8. 8.Which is closest to 801 × 49? (Round each number first.) (a) 80000 (b) 4000 (c) 40000 (d) 400000
9. 9.Which is closest to 303 × 72? (Round each number first.) (a) 210000 (b) 2100 (c) 21000 (d) 42000
10. 10.Round 36657 to the nearest thousand.
11. 11.Which is closest to 98 + 798 + 497? (a) 1500 (b) 1300 (c) 1400 (d) 1600
12. 12.Which is closest to 802 × 28? (Round each number first.) (a) 2400 (b) 24000 (c) 48000 (d) 240000
13. 13.Which is closest to 695 + 505 + 305? (a) 1700 (b) 1600 (c) 1400 (d) 1500
14. 14.Which is closest to 696 + 196 + 304? (a) 1300 (b) 1400 (c) 1100 (d) 1200
15. 15.Which is closest to 296 + 297 + 195? (a) 1000 (b) 700 (c) 900 (d) 800
16. 16.Round 92.32 to one decimal place. =
17. 17.Round 10.31 to one decimal place. =
18. 18.Which is closest to 702 × 22? (Round each number first.) (a) 140000 (b) 28000 (c) 14000 (d) 1400
19. 19.Which is closest to 397 + 405 + 196? (a) 1200 (b) 1100 (c) 900 (d) 1000
20. 20.Round 34.62 to one decimal place. =
21. 21.Which is closest to 203 × 48? (Round each number first.) (a) 100000 (b) 1000 (c) 10000 (d) 20000
22. 22.Round 30756 to the nearest ten.
23. 23.Round 50927 to the nearest hundred.
24. 24.Which is closest to 796 + 804 + 198? (a) 2000 (b) 1900 (c) 1700 (d) 1800
25. 25.Which is closest to 899 + 400 + 197? (a) 1500 (b) 1600 (c) 1700 (d) 1400
26. 26.Which is closest to 404 + 703 + 99? (a) 1400 (b) 1300 (c) 1100 (d) 1200
27. 27.Which is closest to 498 + 597 + 302? (a) 1500 (b) 1600 (c) 1300 (d) 1400
28. 28.Which is closest to 596 × 58? (Round each number first.) (a) 360000 (b) 36000 (c) 3600 (d) 72000
29. 29.Which is closest to 397 × 69? (Round each number first.) (a) 280000 (b) 2800 (c) 28000 (d) 56000
30. 30.Which is closest to 596 × 22? (Round each number first.) (a) 24000 (b) 12000 (c) 120000 (d) 1200
31. 31.Which is closest to 297 × 60? (Round each number first.) (a) 180000 (b) 18000 (c) 36000 (d) 1800
32. 32.Round 5290 to the nearest hundred.
33. 33.Which is closest to 603 ÷ 19? (a) 15 (b) 300 (c) 30 (d) 60
34. 34.Which is closest to 398 × 48? (Round each number first.) (a) 2000 (b) 40000 (c) 200000 (d) 20000
35. 35.Round 29102 to the nearest ten.
36. 36.Which is closest to 699 × 91? (Round each number first.) (a) 6300 (b) 126000 (c) 63000 (d) 630000
37. 37.Which is closest to 898 + 204 + 297? (a) 1500 (b) 1400 (c) 1300 (d) 1600
38. 38.Which is closest to 700 × 68? (Round each number first.) (a) 490000 (b) 98000 (c) 4900 (d) 49000
39. 39.Round 58.22 to one decimal place. =
40. 40.Which is closest to 1000 ÷ 21? (a) 50 (b) 100 (c) 25 (d) 500

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