Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 116 · 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 798 × 28? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
2. 2.Round 95.28 to one decimal place. =
3. 3.Which is closest to 401 × 69? (Round each number first.) (a) 28000 (b) 280000 (c) 2800 (d) 56000
4. 4.Which is closest to 504 × 32? (Round each number first.) (a) 1500 (b) 150000 (c) 30000 (d) 15000
5. 5.Which is closest to 95 + 901 + 404? (a) 1600 (b) 1500 (c) 1300 (d) 1400
6. 6.Round 67.34 to one decimal place. =
7. 7.Which is closest to 203 × 69? (Round each number first.) (a) 28000 (b) 14000 (c) 140000 (d) 1400
8. 8.Round 92789 to the nearest ten.
9. 9.Which is closest to 697 × 90? (Round each number first.) (a) 630000 (b) 126000 (c) 63000 (d) 6300
10. 10.Which is closest to 3207 ÷ 41? (a) 80 (b) 40 (c) 160 (d) 800
11. 11.Which is closest to 1999 ÷ 49? (a) 40 (b) 80 (c) 400 (d) 20
12. 12.Which is closest to 604 × 38? (Round each number first.) (a) 24000 (b) 240000 (c) 2400 (d) 48000
13. 13.Which is closest to 1203 ÷ 29? (a) 20 (b) 400 (c) 40 (d) 80
14. 14.Which is closest to 601 × 62? (Round each number first.) (a) 3600 (b) 36000 (c) 72000 (d) 360000
15. 15.Which is closest to 1596 ÷ 19? (a) 800 (b) 80 (c) 40 (d) 160
16. 16.Round 32.08 to one decimal place. =
17. 17.Round 60261 to the nearest ten.
18. 18.Which is closest to 801 × 39? (Round each number first.) (a) 32000 (b) 320000 (c) 3200 (d) 64000
19. 19.Round 34174 to the nearest ten.
20. 20.Round 86355 to the nearest hundred.
21. 21.Which is closest to 700 × 48? (Round each number first.) (a) 3500 (b) 35000 (c) 350000 (d) 70000
22. 22.Which is closest to 296 × 89? (Round each number first.) (a) 2700 (b) 27000 (c) 54000 (d) 270000
23. 23.Which is closest to 795 ÷ 19? (a) 20 (b) 80 (c) 400 (d) 40
24. 24.Round 53529 to the nearest ten.
25. 25.Which is closest to 902 × 72? (Round each number first.) (a) 630000 (b) 6300 (c) 126000 (d) 63000
26. 26.Which is closest to 900 × 72? (Round each number first.) (a) 630000 (b) 6300 (c) 126000 (d) 63000
27. 27.Round 7693 to the nearest hundred.
28. 28.Which is closest to 800 × 52? (Round each number first.) (a) 80000 (b) 400000 (c) 4000 (d) 40000
29. 29.Which is closest to 496 × 22? (Round each number first.) (a) 10000 (b) 100000 (c) 20000 (d) 1000
30. 30.Round 25.59 to one decimal place. =
31. 31.Which is closest to 2794 ÷ 41? (a) 35 (b) 70 (c) 140 (d) 700
32. 32.Round 17.57 to one decimal place. =
33. 33.Which is closest to 2000 ÷ 39? (a) 100 (b) 25 (c) 50 (d) 500
34. 34.Which is closest to 596 × 22? (Round each number first.) (a) 24000 (b) 12000 (c) 120000 (d) 1200
35. 35.Round 68.89 to one decimal place. =
36. 36.Which is closest to 603 × 52? (Round each number first.) (a) 300000 (b) 3000 (c) 60000 (d) 30000
37. 37.Which is closest to 403 + 398 + 396? (a) 1100 (b) 1300 (c) 1200 (d) 1400
38. 38.Which is closest to 397 × 91? (Round each number first.) (a) 36000 (b) 360000 (c) 3600 (d) 72000
39. 39.Round 10.76 to one decimal place. =
40. 40.Which is closest to 1600 ÷ 21? (a) 160 (b) 80 (c) 40 (d) 800

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