Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 916 · 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 303 + 701 + 697? (a) 1800 (b) 1900 (c) 1700 (d) 1600
2. 2.Which is closest to 102 + 305 + 303? (a) 800 (b) 600 (c) 900 (d) 700
3. 3.Which is closest to 404 × 59? (Round each number first.) (a) 24000 (b) 2400 (c) 240000 (d) 48000
4. 4.Which is closest to 404 + 496 + 600? (a) 1500 (b) 1700 (c) 1400 (d) 1600
5. 5.Which is closest to 1609 ÷ 21? (a) 40 (b) 800 (c) 160 (d) 80
6. 6.Which is closest to 698 × 81? (Round each number first.) (a) 560000 (b) 56000 (c) 112000 (d) 5600
7. 7.Which is closest to 1203 ÷ 41? (a) 60 (b) 30 (c) 300 (d) 15
8. 8.Round 52852 to the nearest ten.
9. 9.Which is closest to 200 + 202 + 700? (a) 1300 (b) 1100 (c) 1200 (d) 1000
10. 10.Which is closest to 604 + 705 + 600? (a) 2000 (b) 1800 (c) 1900 (d) 2100
11. 11.Which is closest to 599 × 18? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
12. 12.Which is closest to 798 × 28? (Round each number first.) (a) 48000 (b) 240000 (c) 2400 (d) 24000
13. 13.Which is closest to 803 × 91? (Round each number first.) (a) 72000 (b) 720000 (c) 7200 (d) 144000
14. 14.Which is closest to 203 × 51? (Round each number first.) (a) 1000 (b) 10000 (c) 20000 (d) 100000
15. 15.Round 59.31 to one decimal place. =
16. 16.Which is closest to 303 + 404 + 299? (a) 1100 (b) 1000 (c) 1200 (d) 900
17. 17.Round 13.93 to one decimal place. =
18. 18.Which is closest to 404 × 32? (Round each number first.) (a) 1200 (b) 12000 (c) 24000 (d) 120000
19. 19.Round 70.46 to one decimal place. =
20. 20.Which is closest to 3604 ÷ 41? (a) 45 (b) 900 (c) 180 (d) 90
21. 21.Which is closest to 607 ÷ 31? (a) 200 (b) 10 (c) 20 (d) 40
22. 22.Which is closest to 796 + 696 + 295? (a) 2000 (b) 1700 (c) 1800 (d) 1900
23. 23.Which is closest to 798 + 300 + 697? (a) 2000 (b) 1900 (c) 1700 (d) 1800
24. 24.Which is closest to 201 × 51? (Round each number first.) (a) 100000 (b) 1000 (c) 10000 (d) 20000
25. 25.Which is closest to 797 ÷ 39? (a) 40 (b) 200 (c) 20 (d) 10
26. 26.Which is closest to 596 × 32? (Round each number first.) (a) 180000 (b) 36000 (c) 1800 (d) 18000
27. 27.Which is closest to 804 ÷ 39? (a) 20 (b) 40 (c) 200 (d) 10
28. 28.Round 70723 to the nearest hundred.
29. 29.Which is closest to 404 × 60? (Round each number first.) (a) 24000 (b) 240000 (c) 48000 (d) 2400
30. 30.Which is closest to 903 + 299 + 203? (a) 1600 (b) 1500 (c) 1400 (d) 1300
31. 31.Which is closest to 895 + 197 + 97? (a) 1100 (b) 1400 (c) 1300 (d) 1200
32. 32.Which is closest to 1791 ÷ 29? (a) 120 (b) 30 (c) 600 (d) 60
33. 33.Which is closest to 496 × 20? (Round each number first.) (a) 10000 (b) 100000 (c) 1000 (d) 20000
34. 34.Which is closest to 897 × 88? (Round each number first.) (a) 162000 (b) 8100 (c) 810000 (d) 81000
35. 35.Round 58.73 to one decimal place. =
36. 36.Which is closest to 199 + 495 + 703? (a) 1500 (b) 1600 (c) 1400 (d) 1300
37. 37.Round 34592 to the nearest ten.
38. 38.Which is closest to 898 × 38? (Round each number first.) (a) 3600 (b) 72000 (c) 36000 (d) 360000
39. 39.Which is closest to 196 × 19? (Round each number first.) (a) 8000 (b) 40000 (c) 400 (d) 4000
40. 40.Round 34574 to the nearest thousand.

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