Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 785 · 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.Round 99.86 to one decimal place. =
2. 2.Round 58.61 to one decimal place. =
3. 3.Round 39576 to the nearest thousand.
4. 4.Which is closest to 200 × 61? (Round each number first.) (a) 120000 (b) 12000 (c) 24000 (d) 1200
5. 5.Which is closest to 606 ÷ 19? (a) 15 (b) 300 (c) 60 (d) 30
6. 6.Round 14.56 to one decimal place. =
7. 7.Round 4166 to the nearest ten.
8. 8.Which is closest to 198 × 81? (Round each number first.) (a) 16000 (b) 32000 (c) 1600 (d) 160000
9. 9.Which is closest to 198 + 298 + 898? (a) 1600 (b) 1500 (c) 1400 (d) 1300
10. 10.Which is closest to 598 × 28? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
11. 11.Which is closest to 404 × 21? (Round each number first.) (a) 16000 (b) 80000 (c) 8000 (d) 800
12. 12.Round 14.26 to one decimal place. =
13. 13.Which is closest to 898 × 92? (Round each number first.) (a) 162000 (b) 81000 (c) 8100 (d) 810000
14. 14.Round 20.68 to one decimal place. =
15. 15.Which is closest to 903 × 30? (Round each number first.) (a) 27000 (b) 2700 (c) 54000 (d) 270000
16. 16.Which is closest to 601 × 32? (Round each number first.) (a) 1800 (b) 18000 (c) 36000 (d) 180000
17. 17.Which is closest to 703 + 98 + 901? (a) 1800 (b) 1900 (c) 1700 (d) 1600
18. 18.Which is closest to 801 × 30? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
19. 19.Round 2852 to the nearest thousand.
20. 20.Which is closest to 398 × 90? (Round each number first.) (a) 3600 (b) 72000 (c) 360000 (d) 36000
21. 21.Round 16862 to the nearest ten.
22. 22.Round 71.61 to one decimal place. =
23. 23.Which is closest to 397 + 798 + 99? (a) 1200 (b) 1300 (c) 1500 (d) 1400
24. 24.Round 60.67 to one decimal place. =
25. 25.Which is closest to 801 × 79? (Round each number first.) (a) 128000 (b) 64000 (c) 6400 (d) 640000
26. 26.Which is closest to 299 × 48? (Round each number first.) (a) 30000 (b) 1500 (c) 15000 (d) 150000
27. 27.Which is closest to 596 × 18? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
28. 28.Round 11.89 to one decimal place. =
29. 29.Which is closest to 791 ÷ 21? (a) 80 (b) 40 (c) 20 (d) 400
30. 30.Which is closest to 599 × 28? (Round each number first.) (a) 1800 (b) 18000 (c) 180000 (d) 36000
31. 31.Which is closest to 591 ÷ 31? (a) 200 (b) 40 (c) 20 (d) 10
32. 32.Which is closest to 593 ÷ 19? (a) 300 (b) 30 (c) 15 (d) 60
33. 33.Which is closest to 197 × 69? (Round each number first.) (a) 140000 (b) 14000 (c) 28000 (d) 1400
34. 34.Which is closest to 593 ÷ 31? (a) 40 (b) 200 (c) 10 (d) 20
35. 35.Which is closest to 700 × 68? (Round each number first.) (a) 98000 (b) 49000 (c) 490000 (d) 4900
36. 36.Round 10529 to the nearest hundred.
37. 37.Which is closest to 204 + 403 + 298? (a) 1000 (b) 1100 (c) 800 (d) 900
38. 38.Which is closest to 902 + 705 + 695? (a) 2400 (b) 2300 (c) 2200 (d) 2500
39. 39.Which is closest to 696 + 297 + 901? (a) 1800 (b) 2000 (c) 2100 (d) 1900
40. 40.Which is closest to 595 + 100 + 201? (a) 1000 (b) 800 (c) 900 (d) 1100

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