Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 392 · 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 55997 to the nearest hundred.
2. 2.Round 67023 to the nearest ten.
3. 3.Which is closest to 301 × 71? (Round each number first.) (a) 42000 (b) 210000 (c) 2100 (d) 21000
4. 4.Round 28568 to the nearest ten.
5. 5.Round 76675 to the nearest hundred.
6. 6.Round 69710 to the nearest thousand.
7. 7.Round 21.64 to one decimal place. =
8. 8.Which is closest to 202 × 79? (Round each number first.) (a) 16000 (b) 1600 (c) 160000 (d) 32000
9. 9.Round 58567 to the nearest ten.
10. 10.Round 89708 to the nearest hundred.
11. 11.Round 48.22 to one decimal place. =
12. 12.Round 19569 to the nearest ten.
13. 13.Round 61.66 to one decimal place. =
14. 14.Round 92.32 to one decimal place. =
15. 15.Which is closest to 699 + 605 + 898? (a) 2200 (b) 2400 (c) 2100 (d) 2300
16. 16.Which is closest to 2491 ÷ 51? (a) 100 (b) 500 (c) 25 (d) 50
17. 17.Which is closest to 303 + 398 + 398? (a) 1100 (b) 1200 (c) 1000 (d) 1300
18. 18.Which is closest to 195 + 299 + 695? (a) 1400 (b) 1100 (c) 1200 (d) 1300
19. 19.Round 6505 to the nearest thousand.
20. 20.Round 64.39 to one decimal place. =
21. 21.Round 14.38 to one decimal place. =
22. 22.Which is closest to 799 × 21? (Round each number first.) (a) 160000 (b) 32000 (c) 16000 (d) 1600
23. 23.Which is closest to 97 + 697 + 300? (a) 1300 (b) 1000 (c) 1100 (d) 1200
24. 24.Which is closest to 2698 ÷ 29? (a) 180 (b) 90 (c) 45 (d) 900
25. 25.Which is closest to 198 × 21? (Round each number first.) (a) 4000 (b) 8000 (c) 40000 (d) 400
26. 26.Round 79.73 to one decimal place. =
27. 27.Round 81436 to the nearest ten.
28. 28.Round 62148 to the nearest thousand.
29. 29.Which is closest to 1807 ÷ 19? (a) 900 (b) 45 (c) 90 (d) 180
30. 30.Which is closest to 797 × 60? (Round each number first.) (a) 480000 (b) 96000 (c) 4800 (d) 48000
31. 31.Which is closest to 200 × 71? (Round each number first.) (a) 14000 (b) 28000 (c) 1400 (d) 140000
32. 32.Which is closest to 196 + 205 + 498? (a) 1000 (b) 1100 (c) 900 (d) 800
33. 33.Which is closest to 796 × 71? (Round each number first.) (a) 560000 (b) 56000 (c) 5600 (d) 112000
34. 34.Round 91.91 to one decimal place. =
35. 35.Which is closest to 503 + 302 + 102? (a) 1100 (b) 900 (c) 1000 (d) 800
36. 36.Round 4768 to the nearest thousand.
37. 37.Which is closest to 791 ÷ 19? (a) 40 (b) 20 (c) 80 (d) 400
38. 38.Round 51952 to the nearest hundred.
39. 39.Which is closest to 197 × 20? (Round each number first.) (a) 8000 (b) 40000 (c) 400 (d) 4000
40. 40.Round 86.64 to one decimal place. =

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