Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 823 · 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 1000 ÷ 21? (a) 100 (b) 50 (c) 500 (d) 25
2. 2.Round 84803 to the nearest thousand.
3. 3.Which is closest to 201 × 69? (Round each number first.) (a) 14000 (b) 140000 (c) 28000 (d) 1400
4. 4.Which is closest to 897 × 88? (Round each number first.) (a) 810000 (b) 81000 (c) 162000 (d) 8100
5. 5.Round 75352 to the nearest thousand.
6. 6.Which is closest to 1998 ÷ 39? (a) 25 (b) 100 (c) 50 (d) 500
7. 7.Which is closest to 604 + 697 + 400? (a) 1900 (b) 1600 (c) 1800 (d) 1700
8. 8.Which is closest to 397 × 38? (Round each number first.) (a) 32000 (b) 160000 (c) 16000 (d) 1600
9. 9.Which is closest to 299 × 72? (Round each number first.) (a) 42000 (b) 21000 (c) 2100 (d) 210000
10. 10.Which is closest to 201 + 896 + 96? (a) 1100 (b) 1400 (c) 1300 (d) 1200
11. 11.Which is closest to 301 × 30? (Round each number first.) (a) 90000 (b) 18000 (c) 900 (d) 9000
12. 12.Round 23307 to the nearest ten.
13. 13.Which is closest to 701 × 81? (Round each number first.) (a) 560000 (b) 112000 (c) 5600 (d) 56000
14. 14.Which is closest to 897 + 100 + 299? (a) 1200 (b) 1300 (c) 1400 (d) 1500
15. 15.Round 80691 to the nearest ten.
16. 16.Which is closest to 298 × 60? (Round each number first.) (a) 36000 (b) 180000 (c) 18000 (d) 1800
17. 17.Which is closest to 202 + 301 + 702? (a) 1100 (b) 1200 (c) 1400 (d) 1300
18. 18.Which is closest to 502 + 201 + 795? (a) 1700 (b) 1400 (c) 1500 (d) 1600
19. 19.Which is closest to 801 + 397 + 204? (a) 1300 (b) 1400 (c) 1600 (d) 1500
20. 20.Which is closest to 99 + 697 + 599? (a) 1500 (b) 1400 (c) 1600 (d) 1300
21. 21.Which is closest to 304 + 199 + 396? (a) 1000 (b) 900 (c) 1100 (d) 800
22. 22.Round 59.26 to one decimal place. =
23. 23.Which is closest to 500 + 404 + 795? (a) 1900 (b) 1800 (c) 1700 (d) 1600
24. 24.Round 11.83 to one decimal place. =
25. 25.Round 99136 to the nearest ten.
26. 26.Which is closest to 296 × 21? (Round each number first.) (a) 12000 (b) 60000 (c) 6000 (d) 600
27. 27.Round 97.68 to one decimal place. =
28. 28.Round 85039 to the nearest thousand.
29. 29.Which is closest to 903 + 404 + 196? (a) 1600 (b) 1500 (c) 1400 (d) 1700
30. 30.Round 99.24 to one decimal place. =
31. 31.Which is closest to 909 ÷ 29? (a) 60 (b) 15 (c) 30 (d) 300
32. 32.Round 29.77 to one decimal place. =
33. 33.Which is closest to 297 × 78? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
34. 34.Which is closest to 303 × 20? (Round each number first.) (a) 60000 (b) 600 (c) 12000 (d) 6000
35. 35.Which is closest to 299 × 29? (Round each number first.) (a) 18000 (b) 9000 (c) 90000 (d) 900
36. 36.Which is closest to 396 × 28? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
37. 37.Which is closest to 597 + 198 + 603? (a) 1300 (b) 1500 (c) 1600 (d) 1400
38. 38.Round 82861 to the nearest thousand.
39. 39.Which is closest to 802 × 21? (Round each number first.) (a) 16000 (b) 160000 (c) 32000 (d) 1600
40. 40.Which is closest to 501 × 71? (Round each number first.) (a) 70000 (b) 35000 (c) 350000 (d) 3500

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