Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 237 · 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 497 + 401 + 903? (a) 2000 (b) 1800 (c) 1700 (d) 1900
2. 2.Which is closest to 204 + 701 + 402? (a) 1200 (b) 1300 (c) 1400 (d) 1500
3. 3.Which is closest to 401 + 405 + 196? (a) 1100 (b) 1000 (c) 1200 (d) 900
4. 4.Round 57.62 to one decimal place. =
5. 5.Which is closest to 300 × 62? (Round each number first.) (a) 36000 (b) 180000 (c) 18000 (d) 1800
6. 6.Which is closest to 100 + 299 + 103? (a) 400 (b) 500 (c) 600 (d) 700
7. 7.Which is closest to 902 × 90? (Round each number first.) (a) 81000 (b) 162000 (c) 810000 (d) 8100
8. 8.Round 32.36 to one decimal place. =
9. 9.Round 15706 to the nearest thousand.
10. 10.Which is closest to 403 × 28? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
11. 11.Which is closest to 200 + 797 + 902? (a) 1900 (b) 1800 (c) 2000 (d) 2100
12. 12.Round 28995 to the nearest hundred.
13. 13.Which is closest to 197 × 71? (Round each number first.) (a) 1400 (b) 28000 (c) 140000 (d) 14000
14. 14.Which is closest to 301 × 38? (Round each number first.) (a) 120000 (b) 12000 (c) 24000 (d) 1200
15. 15.Which is closest to 2398 ÷ 41? (a) 120 (b) 30 (c) 60 (d) 600
16. 16.Which is closest to 697 × 78? (Round each number first.) (a) 112000 (b) 560000 (c) 56000 (d) 5600
17. 17.Which is closest to 701 + 504 + 401? (a) 1700 (b) 1600 (c) 1800 (d) 1500
18. 18.Which is closest to 1200 ÷ 41? (a) 60 (b) 15 (c) 30 (d) 300
19. 19.Round 76413 to the nearest thousand.
20. 20.Which is closest to 2093 ÷ 29? (a) 700 (b) 35 (c) 70 (d) 140
21. 21.Round 24.52 to one decimal place. =
22. 22.Round 41003 to the nearest thousand.
23. 23.Which is closest to 296 × 38? (Round each number first.) (a) 24000 (b) 1200 (c) 120000 (d) 12000
24. 24.Which is closest to 1505 ÷ 51? (a) 15 (b) 30 (c) 300 (d) 60
25. 25.Round 33903 to the nearest ten.
26. 26.Which is closest to 601 + 895 + 301? (a) 2000 (b) 1800 (c) 1700 (d) 1900
27. 27.Round 52.93 to one decimal place. =
28. 28.Round 22.36 to one decimal place. =
29. 29.Round 17.64 to one decimal place. =
30. 30.Round 51.89 to one decimal place. =
31. 31.Round 74.06 to one decimal place. =
32. 32.Round 95188 to the nearest ten.
33. 33.Round 11984 to the nearest hundred.
34. 34.Round 76182 to the nearest ten.
35. 35.Round 31119 to the nearest hundred.
36. 36.Round 22549 to the nearest ten.
37. 37.Which is closest to 2994 ÷ 51? (a) 30 (b) 60 (c) 120 (d) 600
38. 38.Which is closest to 1797 ÷ 29? (a) 30 (b) 600 (c) 60 (d) 120
39. 39.Which is closest to 991 ÷ 19? (a) 500 (b) 50 (c) 100 (d) 25
40. 40.Round 24168 to the nearest ten.

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