Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 316 · 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 703 + 800 + 303? (a) 1700 (b) 1800 (c) 1900 (d) 2000
2. 2.Round 1637 to the nearest ten.
3. 3.Which is closest to 3594 ÷ 41? (a) 90 (b) 180 (c) 900 (d) 45
4. 4.Round 10448 to the nearest thousand.
5. 5.Round 55.87 to one decimal place. =
6. 6.Round 98.78 to one decimal place. =
7. 7.Round 83709 to the nearest hundred.
8. 8.Round 14.22 to one decimal place. =
9. 9.Round 15192 to the nearest ten.
10. 10.Round 71468 to the nearest thousand.
11. 11.Which is closest to 904 × 61? (Round each number first.) (a) 54000 (b) 108000 (c) 540000 (d) 5400
12. 12.Round 98.87 to one decimal place. =
13. 13.Round 74.22 to one decimal place. =
14. 14.Which is closest to 302 × 19? (Round each number first.) (a) 60000 (b) 6000 (c) 600 (d) 12000
15. 15.Round 58012 to the nearest thousand.
16. 16.Round 46.46 to one decimal place. =
17. 17.Round 54.74 to one decimal place. =
18. 18.Which is closest to 598 + 104 + 399? (a) 1000 (b) 1200 (c) 1100 (d) 1300
19. 19.Which is closest to 2405 ÷ 41? (a) 120 (b) 30 (c) 60 (d) 600
20. 20.Which is closest to 598 + 200 + 196? (a) 900 (b) 1000 (c) 1100 (d) 1200
21. 21.Which is closest to 503 × 88? (Round each number first.) (a) 4500 (b) 45000 (c) 90000 (d) 450000
22. 22.Which is closest to 2803 ÷ 41? (a) 140 (b) 700 (c) 70 (d) 35
23. 23.Which is closest to 799 × 62? (Round each number first.) (a) 4800 (b) 96000 (c) 480000 (d) 48000
24. 24.Which is closest to 595 + 600 + 398? (a) 1500 (b) 1800 (c) 1600 (d) 1700
25. 25.Round 23.83 to one decimal place. =
26. 26.Which is closest to 802 × 52? (Round each number first.) (a) 80000 (b) 4000 (c) 40000 (d) 400000
27. 27.Which is closest to 797 × 28? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
28. 28.Which is closest to 700 × 92? (Round each number first.) (a) 63000 (b) 6300 (c) 126000 (d) 630000
29. 29.Which is closest to 902 × 22? (Round each number first.) (a) 1800 (b) 180000 (c) 18000 (d) 36000
30. 30.Round 85506 to the nearest hundred.
31. 31.Which is closest to 502 + 198 + 499? (a) 1200 (b) 1400 (c) 1100 (d) 1300
32. 32.Which is closest to 297 × 32? (Round each number first.) (a) 900 (b) 90000 (c) 18000 (d) 9000
33. 33.Which is closest to 197 × 59? (Round each number first.) (a) 1200 (b) 120000 (c) 12000 (d) 24000
34. 34.Round 53.76 to one decimal place. =
35. 35.Which is closest to 197 × 70? (Round each number first.) (a) 14000 (b) 28000 (c) 1400 (d) 140000
36. 36.Round 71101 to the nearest ten.
37. 37.Round 33754 to the nearest thousand.
38. 38.Which is closest to 102 + 104 + 499? (a) 800 (b) 600 (c) 700 (d) 900
39. 39.Which is closest to 699 × 48? (Round each number first.) (a) 350000 (b) 3500 (c) 70000 (d) 35000
40. 40.Round 14.29 to one decimal place. =

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