Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 118 · 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 4307 to the nearest ten.
2. 2.Which is closest to 403 + 98 + 197? (a) 900 (b) 800 (c) 600 (d) 700
3. 3.Which is closest to 902 × 30? (Round each number first.) (a) 27000 (b) 270000 (c) 54000 (d) 2700
4. 4.Which is closest to 498 × 22? (Round each number first.) (a) 1000 (b) 100000 (c) 20000 (d) 10000
5. 5.Which is closest to 97 + 605 + 796? (a) 1600 (b) 1700 (c) 1500 (d) 1400
6. 6.Round 65.44 to one decimal place. =
7. 7.Which is closest to 404 + 401 + 397? (a) 1100 (b) 1300 (c) 1200 (d) 1400
8. 8.Which is closest to 700 + 796 + 205? (a) 1800 (b) 1600 (c) 1700 (d) 1900
9. 9.Which is closest to 499 × 31? (Round each number first.) (a) 1500 (b) 150000 (c) 30000 (d) 15000
10. 10.Which is closest to 499 × 21? (Round each number first.) (a) 1000 (b) 10000 (c) 20000 (d) 100000
11. 11.Which is closest to 699 + 899 + 97? (a) 1800 (b) 1900 (c) 1700 (d) 1600
12. 12.Which is closest to 696 × 51? (Round each number first.) (a) 70000 (b) 35000 (c) 350000 (d) 3500
13. 13.Which is closest to 798 + 502 + 795? (a) 2100 (b) 2300 (c) 2000 (d) 2200
14. 14.Which is closest to 897 + 96 + 799? (a) 1700 (b) 1900 (c) 1800 (d) 2000
15. 15.Which is closest to 204 × 41? (Round each number first.) (a) 16000 (b) 8000 (c) 80000 (d) 800
16. 16.Round 24223 to the nearest thousand.
17. 17.Which is closest to 204 + 601 + 604? (a) 1400 (b) 1600 (c) 1300 (d) 1500
18. 18.Round 54590 to the nearest hundred.
19. 19.Which is closest to 499 × 38? (Round each number first.) (a) 200000 (b) 20000 (c) 2000 (d) 40000
20. 20.Round 27166 to the nearest thousand.
21. 21.Which is closest to 499 × 88? (Round each number first.) (a) 90000 (b) 45000 (c) 4500 (d) 450000
22. 22.Round 76.19 to one decimal place. =
23. 23.Round 44981 to the nearest hundred.
24. 24.Round 49.89 to one decimal place. =
25. 25.Which is closest to 895 ÷ 29? (a) 60 (b) 300 (c) 15 (d) 30
26. 26.Round 13.57 to one decimal place. =
27. 27.Round 59333 to the nearest ten.
28. 28.Which is closest to 704 × 89? (Round each number first.) (a) 126000 (b) 63000 (c) 630000 (d) 6300
29. 29.Which is closest to 501 × 48? (Round each number first.) (a) 50000 (b) 25000 (c) 250000 (d) 2500
30. 30.Round 36.23 to one decimal place. =
31. 31.Which is closest to 701 × 58? (Round each number first.) (a) 42000 (b) 420000 (c) 4200 (d) 84000
32. 32.Which is closest to 598 + 303 + 196? (a) 1200 (b) 1000 (c) 1100 (d) 1300
33. 33.Which is closest to 302 × 32? (Round each number first.) (a) 9000 (b) 90000 (c) 18000 (d) 900
34. 34.Which is closest to 97 + 701 + 395? (a) 1400 (b) 1100 (c) 1300 (d) 1200
35. 35.Round 97.14 to one decimal place. =
36. 36.Round 25142 to the nearest hundred.
37. 37.Which is closest to 1203 ÷ 31? (a) 400 (b) 80 (c) 40 (d) 20
38. 38.Which is closest to 601 + 802 + 100? (a) 1500 (b) 1600 (c) 1700 (d) 1400
39. 39.Which is closest to 601 + 498 + 300? (a) 1500 (b) 1600 (c) 1400 (d) 1300
40. 40.Which is closest to 198 × 21? (Round each number first.) (a) 40000 (b) 8000 (c) 4000 (d) 400

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