Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 694 · 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 195 + 804 + 202? (a) 1200 (b) 1400 (c) 1100 (d) 1300
2. 2.Round 13.07 to one decimal place. =
3. 3.Which is closest to 502 + 804 + 103? (a) 1400 (b) 1300 (c) 1600 (d) 1500
4. 4.Which is closest to 704 × 88? (Round each number first.) (a) 126000 (b) 630000 (c) 6300 (d) 63000
5. 5.Round 80602 to the nearest ten.
6. 6.Which is closest to 801 + 303 + 202? (a) 1300 (b) 1400 (c) 1200 (d) 1500
7. 7.Which is closest to 701 × 28? (Round each number first.) (a) 42000 (b) 21000 (c) 210000 (d) 2100
8. 8.Round 88432 to the nearest thousand.
9. 9.Which is closest to 4500 ÷ 51? (a) 45 (b) 900 (c) 180 (d) 90
10. 10.Which is closest to 1003 ÷ 51? (a) 200 (b) 10 (c) 40 (d) 20
11. 11.Which is closest to 1198 ÷ 19? (a) 30 (b) 600 (c) 60 (d) 120
12. 12.Which is closest to 399 × 69? (Round each number first.) (a) 56000 (b) 280000 (c) 28000 (d) 2800
13. 13.Which is closest to 598 × 88? (Round each number first.) (a) 54000 (b) 5400 (c) 108000 (d) 540000
14. 14.Which is closest to 2796 ÷ 39? (a) 140 (b) 700 (c) 35 (d) 70
15. 15.Which is closest to 95 + 197 + 598? (a) 800 (b) 900 (c) 1000 (d) 1100
16. 16.Round 73.09 to one decimal place. =
17. 17.Round 26.57 to one decimal place. =
18. 18.Round 41.91 to one decimal place. =
19. 19.Which is closest to 902 × 39? (Round each number first.) (a) 72000 (b) 3600 (c) 360000 (d) 36000
20. 20.Which is closest to 1193 ÷ 21? (a) 60 (b) 120 (c) 600 (d) 30
21. 21.Which is closest to 203 + 300 + 397? (a) 1100 (b) 900 (c) 1000 (d) 800
22. 22.Which is closest to 204 + 695 + 96? (a) 900 (b) 1100 (c) 1000 (d) 1200
23. 23.Which is closest to 703 × 79? (Round each number first.) (a) 5600 (b) 56000 (c) 560000 (d) 112000
24. 24.Which is closest to 698 × 29? (Round each number first.) (a) 210000 (b) 21000 (c) 42000 (d) 2100
25. 25.Round 44344 to the nearest ten.
26. 26.Round 39.32 to one decimal place. =
27. 27.Which is closest to 196 + 401 + 401? (a) 1200 (b) 1000 (c) 1100 (d) 900
28. 28.Which is closest to 103 + 697 + 97? (a) 800 (b) 900 (c) 1100 (d) 1000
29. 29.Which is closest to 200 × 18? (Round each number first.) (a) 40000 (b) 4000 (c) 400 (d) 8000
30. 30.Which is closest to 502 × 42? (Round each number first.) (a) 2000 (b) 20000 (c) 200000 (d) 40000
31. 31.Which is closest to 804 × 41? (Round each number first.) (a) 3200 (b) 320000 (c) 64000 (d) 32000
32. 32.Which is closest to 896 × 41? (Round each number first.) (a) 3600 (b) 36000 (c) 360000 (d) 72000
33. 33.Which is closest to 801 × 49? (Round each number first.) (a) 40000 (b) 400000 (c) 4000 (d) 80000
34. 34.Which is closest to 701 × 31? (Round each number first.) (a) 2100 (b) 210000 (c) 21000 (d) 42000
35. 35.Which is closest to 500 + 196 + 595? (a) 1200 (b) 1300 (c) 1500 (d) 1400
36. 36.Which is closest to 601 × 90? (Round each number first.) (a) 5400 (b) 108000 (c) 54000 (d) 540000
37. 37.Which is closest to 396 × 80? (Round each number first.) (a) 64000 (b) 320000 (c) 32000 (d) 3200
38. 38.Which is closest to 404 + 104 + 295? (a) 900 (b) 700 (c) 1000 (d) 800
39. 39.Which is closest to 599 × 50? (Round each number first.) (a) 300000 (b) 30000 (c) 60000 (d) 3000
40. 40.Round 61110 to the nearest hundred.

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