Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 970 · 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 697 × 60? (Round each number first.) (a) 4200 (b) 84000 (c) 420000 (d) 42000
2. 2.Which is closest to 1498 ÷ 49? (a) 15 (b) 300 (c) 30 (d) 60
3. 3.Which is closest to 801 × 38? (Round each number first.) (a) 3200 (b) 320000 (c) 64000 (d) 32000
4. 4.Which is closest to 796 × 19? (Round each number first.) (a) 160000 (b) 32000 (c) 16000 (d) 1600
5. 5.Round 95597 to the nearest hundred.
6. 6.Which is closest to 399 ÷ 21? (a) 10 (b) 20 (c) 40 (d) 200
7. 7.Which is closest to 2108 ÷ 29? (a) 700 (b) 70 (c) 140 (d) 35
8. 8.Which is closest to 2995 ÷ 49? (a) 600 (b) 120 (c) 30 (d) 60
9. 9.Which is closest to 604 + 602 + 299? (a) 1600 (b) 1400 (c) 1500 (d) 1700
10. 10.Which is closest to 302 × 28? (Round each number first.) (a) 900 (b) 90000 (c) 18000 (d) 9000
11. 11.Which is closest to 503 + 205 + 98? (a) 800 (b) 1000 (c) 700 (d) 900
12. 12.Which is closest to 397 + 805 + 696? (a) 2100 (b) 1900 (c) 2000 (d) 1800
13. 13.Which is closest to 202 × 41? (Round each number first.) (a) 8000 (b) 80000 (c) 16000 (d) 800
14. 14.Which is closest to 396 + 797 + 599? (a) 1900 (b) 2000 (c) 1700 (d) 1800
15. 15.Round 42614 to the nearest thousand.
16. 16.Which is closest to 596 × 18? (Round each number first.) (a) 120000 (b) 12000 (c) 24000 (d) 1200
17. 17.Which is closest to 798 + 695 + 100? (a) 1500 (b) 1700 (c) 1800 (d) 1600
18. 18.Which is closest to 1191 ÷ 19? (a) 60 (b) 120 (c) 30 (d) 600
19. 19.Which is closest to 697 × 48? (Round each number first.) (a) 3500 (b) 70000 (c) 35000 (d) 350000
20. 20.Which is closest to 898 × 71? (Round each number first.) (a) 126000 (b) 630000 (c) 63000 (d) 6300
21. 21.Which is closest to 496 × 51? (Round each number first.) (a) 2500 (b) 50000 (c) 250000 (d) 25000
22. 22.Which is closest to 1997 ÷ 49? (a) 80 (b) 40 (c) 400 (d) 20
23. 23.Round 76661 to the nearest hundred.
24. 24.Which is closest to 799 + 196 + 199? (a) 1300 (b) 1400 (c) 1200 (d) 1100
25. 25.Which is closest to 704 + 903 + 199? (a) 1900 (b) 1700 (c) 1800 (d) 2000
26. 26.Which is closest to 904 × 82? (Round each number first.) (a) 720000 (b) 144000 (c) 72000 (d) 7200
27. 27.Round 69887 to the nearest hundred.
28. 28.Round 85920 to the nearest hundred.
29. 29.Round 95.26 to one decimal place. =
30. 30.Which is closest to 603 × 21? (Round each number first.) (a) 1200 (b) 24000 (c) 120000 (d) 12000
31. 31.Which is closest to 198 × 18? (Round each number first.) (a) 400 (b) 4000 (c) 8000 (d) 40000
32. 32.Which is closest to 200 × 72? (Round each number first.) (a) 28000 (b) 1400 (c) 140000 (d) 14000
33. 33.Which is closest to 1008 ÷ 19? (a) 25 (b) 50 (c) 100 (d) 500
34. 34.Which is closest to 603 × 48? (Round each number first.) (a) 30000 (b) 60000 (c) 300000 (d) 3000
35. 35.Round 20144 to the nearest thousand.
36. 36.Which is closest to 905 + 305 + 201? (a) 1400 (b) 1500 (c) 1300 (d) 1600
37. 37.Which is closest to 1195 ÷ 41? (a) 300 (b) 30 (c) 60 (d) 15
38. 38.Which is closest to 304 × 91? (Round each number first.) (a) 270000 (b) 2700 (c) 27000 (d) 54000
39. 39.Which is closest to 396 + 96 + 804? (a) 1200 (b) 1400 (c) 1300 (d) 1500
40. 40.Which is closest to 804 ÷ 19? (a) 20 (b) 40 (c) 80 (d) 400

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