Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 648 · 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 1493 ÷ 29? (a) 500 (b) 25 (c) 50 (d) 100
2. 2.Which is closest to 805 + 504 + 501? (a) 1900 (b) 1700 (c) 2000 (d) 1800
3. 3.Round 64478 to the nearest thousand.
4. 4.Which is closest to 2707 ÷ 29? (a) 45 (b) 180 (c) 90 (d) 900
5. 5.Round 47.37 to one decimal place. =
6. 6.Round 30.49 to one decimal place. =
7. 7.Which is closest to 903 ÷ 29? (a) 15 (b) 60 (c) 300 (d) 30
8. 8.Round 23316 to the nearest hundred.
9. 9.Round 47.52 to one decimal place. =
10. 10.Which is closest to 202 × 49? (Round each number first.) (a) 10000 (b) 20000 (c) 100000 (d) 1000
11. 11.Which is closest to 601 × 49? (Round each number first.) (a) 60000 (b) 30000 (c) 3000 (d) 300000
12. 12.Round 53097 to the nearest ten.
13. 13.Which is closest to 1794 ÷ 29? (a) 30 (b) 120 (c) 60 (d) 600
14. 14.Which is closest to 800 × 91? (Round each number first.) (a) 720000 (b) 72000 (c) 144000 (d) 7200
15. 15.Which is closest to 607 ÷ 19? (a) 60 (b) 15 (c) 300 (d) 30
16. 16.Round 94.76 to one decimal place. =
17. 17.Which is closest to 604 × 92? (Round each number first.) (a) 108000 (b) 5400 (c) 54000 (d) 540000
18. 18.Round 10123 to the nearest thousand.
19. 19.Which is closest to 403 × 29? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
20. 20.Round 86.86 to one decimal place. =
21. 21.Round 67019 to the nearest thousand.
22. 22.Round 87.93 to one decimal place. =
23. 23.Which is closest to 395 + 96 + 700? (a) 1100 (b) 1400 (c) 1300 (d) 1200
24. 24.Which is closest to 302 × 71? (Round each number first.) (a) 42000 (b) 2100 (c) 21000 (d) 210000
25. 25.Which is closest to 401 × 80? (Round each number first.) (a) 64000 (b) 32000 (c) 3200 (d) 320000
26. 26.Which is closest to 299 × 19? (Round each number first.) (a) 60000 (b) 12000 (c) 6000 (d) 600
27. 27.Round 19.14 to one decimal place. =
28. 28.Which is closest to 903 × 40? (Round each number first.) (a) 360000 (b) 36000 (c) 3600 (d) 72000
29. 29.Which is closest to 1797 ÷ 21? (a) 90 (b) 180 (c) 900 (d) 45
30. 30.Which is closest to 605 + 900 + 604? (a) 2000 (b) 2100 (c) 2200 (d) 2300
31. 31.Which is closest to 604 × 32? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
32. 32.Round 85231 to the nearest thousand.
33. 33.Which is closest to 899 × 31? (Round each number first.) (a) 2700 (b) 27000 (c) 270000 (d) 54000
34. 34.Which is closest to 698 + 401 + 497? (a) 1500 (b) 1700 (c) 1800 (d) 1600
35. 35.Round 2199 to the nearest thousand.
36. 36.Which is closest to 500 × 92? (Round each number first.) (a) 450000 (b) 90000 (c) 4500 (d) 45000
37. 37.Which is closest to 901 + 304 + 303? (a) 1500 (b) 1600 (c) 1400 (d) 1700
38. 38.Round 58074 to the nearest ten.
39. 39.Which is closest to 301 × 18? (Round each number first.) (a) 6000 (b) 60000 (c) 12000 (d) 600
40. 40.Which is closest to 702 × 48? (Round each number first.) (a) 70000 (b) 3500 (c) 35000 (d) 350000

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