Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 423 · 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 596 × 38? (Round each number first.) (a) 2400 (b) 24000 (c) 48000 (d) 240000
2. 2.Round 30081 to the nearest ten.
3. 3.Round 70.39 to one decimal place. =
4. 4.Which is closest to 697 × 18? (Round each number first.) (a) 1400 (b) 140000 (c) 28000 (d) 14000
5. 5.Round 48462 to the nearest hundred.
6. 6.Which is closest to 503 × 40? (Round each number first.) (a) 2000 (b) 200000 (c) 40000 (d) 20000
7. 7.Round 73.12 to one decimal place. =
8. 8.Round 33.82 to one decimal place. =
9. 9.Which is closest to 396 + 401 + 405? (a) 1400 (b) 1100 (c) 1300 (d) 1200
10. 10.Which is closest to 196 + 703 + 96? (a) 1000 (b) 900 (c) 1200 (d) 1100
11. 11.Which is closest to 504 × 79? (Round each number first.) (a) 80000 (b) 4000 (c) 40000 (d) 400000
12. 12.Round 27256 to the nearest thousand.
13. 13.Which is closest to 199 × 69? (Round each number first.) (a) 14000 (b) 140000 (c) 28000 (d) 1400
14. 14.Which is closest to 402 ÷ 19? (a) 40 (b) 10 (c) 20 (d) 200
15. 15.Round 19913 to the nearest ten.
16. 16.Round 91.88 to one decimal place. =
17. 17.Which is closest to 695 + 105 + 896? (a) 1800 (b) 1900 (c) 1600 (d) 1700
18. 18.Which is closest to 301 × 91? (Round each number first.) (a) 270000 (b) 27000 (c) 2700 (d) 54000
19. 19.Which is closest to 698 × 39? (Round each number first.) (a) 56000 (b) 280000 (c) 2800 (d) 28000
20. 20.Round 97144 to the nearest hundred.
21. 21.Which is closest to 704 + 899 + 895? (a) 2700 (b) 2600 (c) 2400 (d) 2500
22. 22.Which is closest to 1992 ÷ 41? (a) 100 (b) 500 (c) 50 (d) 25
23. 23.Round 58702 to the nearest thousand.
24. 24.Round 83080 to the nearest hundred.
25. 25.Round 28213 to the nearest thousand.
26. 26.Round 23667 to the nearest hundred.
27. 27.Round 22621 to the nearest thousand.
28. 28.Which is closest to 799 × 72? (Round each number first.) (a) 560000 (b) 5600 (c) 112000 (d) 56000
29. 29.Which is closest to 604 + 598 + 695? (a) 1900 (b) 1800 (c) 2100 (d) 2000
30. 30.Round 48.56 to one decimal place. =
31. 31.Round 87478 to the nearest thousand.
32. 32.Which is closest to 804 × 88? (Round each number first.) (a) 72000 (b) 144000 (c) 720000 (d) 7200
33. 33.Which is closest to 501 × 19? (Round each number first.) (a) 100000 (b) 1000 (c) 10000 (d) 20000
34. 34.Which is closest to 296 + 95 + 503? (a) 1000 (b) 1100 (c) 900 (d) 800
35. 35.Which is closest to 200 + 96 + 100? (a) 600 (b) 500 (c) 400 (d) 300
36. 36.Which is closest to 500 × 81? (Round each number first.) (a) 40000 (b) 4000 (c) 80000 (d) 400000
37. 37.Which is closest to 296 × 21? (Round each number first.) (a) 6000 (b) 12000 (c) 600 (d) 60000
38. 38.Round 95399 to the nearest thousand.
39. 39.Which is closest to 503 + 503 + 203? (a) 1300 (b) 1400 (c) 1100 (d) 1200
40. 40.Round 34086 to the nearest ten.

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