Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 558 · 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 87036 to the nearest thousand.
2. 2.Which is closest to 798 + 597 + 799? (a) 2100 (b) 2400 (c) 2300 (d) 2200
3. 3.Which is closest to 798 + 104 + 405? (a) 1200 (b) 1400 (c) 1500 (d) 1300
4. 4.Which is closest to 607 ÷ 21? (a) 15 (b) 30 (c) 60 (d) 300
5. 5.Which is closest to 801 × 81? (Round each number first.) (a) 128000 (b) 64000 (c) 640000 (d) 6400
6. 6.Round 81151 to the nearest ten.
7. 7.Which is closest to 1202 ÷ 29? (a) 400 (b) 40 (c) 20 (d) 80
8. 8.Round 80.14 to one decimal place. =
9. 9.Which is closest to 498 + 95 + 597? (a) 1100 (b) 1200 (c) 1400 (d) 1300
10. 10.Round 7787 to the nearest hundred.
11. 11.Round 77732 to the nearest hundred.
12. 12.Which is closest to 402 × 51? (Round each number first.) (a) 20000 (b) 40000 (c) 2000 (d) 200000
13. 13.Which is closest to 197 + 602 + 298? (a) 1200 (b) 1000 (c) 1300 (d) 1100
14. 14.Which is closest to 796 ÷ 19? (a) 400 (b) 20 (c) 80 (d) 40
15. 15.Round 36.13 to one decimal place. =
16. 16.Round 78568 to the nearest thousand.
17. 17.Round 22.23 to one decimal place. =
18. 18.Which is closest to 602 + 902 + 405? (a) 1800 (b) 1900 (c) 2000 (d) 2100
19. 19.Which is closest to 399 × 52? (Round each number first.) (a) 2000 (b) 40000 (c) 200000 (d) 20000
20. 20.Which is closest to 704 + 495 + 905? (a) 2300 (b) 2000 (c) 2100 (d) 2200
21. 21.Round 51.32 to one decimal place. =
22. 22.Which is closest to 297 + 497 + 397? (a) 1100 (b) 1200 (c) 1300 (d) 1400
23. 23.Which is closest to 398 × 20? (Round each number first.) (a) 800 (b) 16000 (c) 8000 (d) 80000
24. 24.Which is closest to 701 × 50? (Round each number first.) (a) 70000 (b) 3500 (c) 350000 (d) 35000
25. 25.Which is closest to 204 + 596 + 902? (a) 1900 (b) 1700 (c) 1800 (d) 1600
26. 26.Round 51232 to the nearest ten.
27. 27.Which is closest to 698 × 22? (Round each number first.) (a) 1400 (b) 28000 (c) 14000 (d) 140000
28. 28.Round 92.78 to one decimal place. =
29. 29.Which is closest to 198 × 68? (Round each number first.) (a) 140000 (b) 28000 (c) 1400 (d) 14000
30. 30.Round 64504 to the nearest ten.
31. 31.Which is closest to 792 ÷ 41? (a) 20 (b) 10 (c) 200 (d) 40
32. 32.Which is closest to 2097 ÷ 29? (a) 70 (b) 35 (c) 140 (d) 700
33. 33.Round 29613 to the nearest thousand.
34. 34.Which is closest to 203 × 78? (Round each number first.) (a) 1600 (b) 160000 (c) 32000 (d) 16000
35. 35.Round 31964 to the nearest ten.
36. 36.Which is closest to 400 × 28? (Round each number first.) (a) 12000 (b) 1200 (c) 24000 (d) 120000
37. 37.Which is closest to 498 × 29? (Round each number first.) (a) 150000 (b) 1500 (c) 30000 (d) 15000
38. 38.Round 70721 to the nearest thousand.
39. 39.Round 95.57 to one decimal place. =
40. 40.Which is closest to 798 × 31? (Round each number first.) (a) 240000 (b) 2400 (c) 24000 (d) 48000

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