Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 806 · 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 396 × 19? (Round each number first.) (a) 800 (b) 8000 (c) 16000 (d) 80000
2. 2.Which is closest to 1198 ÷ 31? (a) 80 (b) 40 (c) 20 (d) 400
3. 3.Round 56.43 to one decimal place. =
4. 4.Which is closest to 299 × 49? (Round each number first.) (a) 30000 (b) 1500 (c) 150000 (d) 15000
5. 5.Round 82.64 to one decimal place. =
6. 6.Round 55917 to the nearest hundred.
7. 7.Round 19.12 to one decimal place. =
8. 8.Which is closest to 901 + 905 + 602? (a) 2300 (b) 2400 (c) 2600 (d) 2500
9. 9.Which is closest to 603 × 40? (Round each number first.) (a) 48000 (b) 24000 (c) 2400 (d) 240000
10. 10.Round 79214 to the nearest ten.
11. 11.Round 89048 to the nearest ten.
12. 12.Which is closest to 1793 ÷ 19? (a) 180 (b) 90 (c) 45 (d) 900
13. 13.Which is closest to 201 × 50? (Round each number first.) (a) 100000 (b) 1000 (c) 10000 (d) 20000
14. 14.Round 69.08 to one decimal place. =
15. 15.Which is closest to 300 + 204 + 598? (a) 1000 (b) 1100 (c) 1300 (d) 1200
16. 16.Which is closest to 200 × 48? (Round each number first.) (a) 100000 (b) 20000 (c) 10000 (d) 1000
17. 17.Which is closest to 703 × 89? (Round each number first.) (a) 630000 (b) 126000 (c) 6300 (d) 63000
18. 18.Which is closest to 1501 ÷ 51? (a) 300 (b) 30 (c) 15 (d) 60
19. 19.Which is closest to 604 × 91? (Round each number first.) (a) 54000 (b) 540000 (c) 108000 (d) 5400
20. 20.Which is closest to 603 × 60? (Round each number first.) (a) 72000 (b) 360000 (c) 36000 (d) 3600
21. 21.Which is closest to 3199 ÷ 39? (a) 40 (b) 160 (c) 80 (d) 800
22. 22.Which is closest to 696 × 81? (Round each number first.) (a) 5600 (b) 112000 (c) 560000 (d) 56000
23. 23.Round 38.86 to one decimal place. =
24. 24.Which is closest to 595 ÷ 31? (a) 40 (b) 10 (c) 20 (d) 200
25. 25.Which is closest to 204 × 72? (Round each number first.) (a) 14000 (b) 140000 (c) 28000 (d) 1400
26. 26.Which is closest to 502 × 19? (Round each number first.) (a) 1000 (b) 10000 (c) 20000 (d) 100000
27. 27.Which is closest to 2502 ÷ 51? (a) 100 (b) 25 (c) 500 (d) 50
28. 28.Round 80.16 to one decimal place. =
29. 29.Which is closest to 904 × 61? (Round each number first.) (a) 108000 (b) 5400 (c) 54000 (d) 540000
30. 30.Which is closest to 798 + 297 + 201? (a) 1500 (b) 1300 (c) 1200 (d) 1400
31. 31.Which is closest to 696 × 82? (Round each number first.) (a) 560000 (b) 112000 (c) 56000 (d) 5600
32. 32.Which is closest to 397 + 604 + 304? (a) 1500 (b) 1300 (c) 1400 (d) 1200
33. 33.Which is closest to 900 × 88? (Round each number first.) (a) 8100 (b) 810000 (c) 81000 (d) 162000
34. 34.Which is closest to 703 × 18? (Round each number first.) (a) 14000 (b) 1400 (c) 140000 (d) 28000
35. 35.Round 14.88 to one decimal place. =
36. 36.Round 77.17 to one decimal place. =
37. 37.Which is closest to 600 + 401 + 797? (a) 1700 (b) 2000 (c) 1800 (d) 1900
38. 38.Which is closest to 299 + 898 + 700? (a) 2000 (b) 1800 (c) 1900 (d) 2100
39. 39.Round 92.79 to one decimal place. =
40. 40.Round 45203 to the nearest thousand.

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