Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 231 · 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 19029 to the nearest hundred.
2. 2.Which is closest to 596 + 105 + 595? (a) 1500 (b) 1200 (c) 1400 (d) 1300
3. 3.Which is closest to 196 × 21? (Round each number first.) (a) 8000 (b) 400 (c) 4000 (d) 40000
4. 4.Which is closest to 696 + 695 + 903? (a) 2500 (b) 2200 (c) 2300 (d) 2400
5. 5.Which is closest to 205 + 795 + 595? (a) 1600 (b) 1700 (c) 1800 (d) 1500
6. 6.Round 63.72 to one decimal place. =
7. 7.Which is closest to 496 × 52? (Round each number first.) (a) 25000 (b) 250000 (c) 2500 (d) 50000
8. 8.Which is closest to 298 × 38? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
9. 9.Which is closest to 197 × 92? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
10. 10.Which is closest to 1801 ÷ 19? (a) 900 (b) 90 (c) 45 (d) 180
11. 11.Round 88031 to the nearest thousand.
12. 12.Which is closest to 404 × 42? (Round each number first.) (a) 16000 (b) 160000 (c) 1600 (d) 32000
13. 13.Which is closest to 397 × 80? (Round each number first.) (a) 3200 (b) 320000 (c) 64000 (d) 32000
14. 14.Which is closest to 1195 ÷ 21? (a) 120 (b) 60 (c) 600 (d) 30
15. 15.Round 41.62 to one decimal place. =
16. 16.Round 17.86 to one decimal place. =
17. 17.Round 25.24 to one decimal place. =
18. 18.Which is closest to 1799 ÷ 29? (a) 120 (b) 600 (c) 60 (d) 30
19. 19.Round 31.82 to one decimal place. =
20. 20.Which is closest to 404 × 38? (Round each number first.) (a) 160000 (b) 16000 (c) 32000 (d) 1600
21. 21.Which is closest to 200 × 79? (Round each number first.) (a) 16000 (b) 32000 (c) 160000 (d) 1600
22. 22.Which is closest to 297 × 52? (Round each number first.) (a) 30000 (b) 150000 (c) 1500 (d) 15000
23. 23.Which is closest to 3995 ÷ 49? (a) 160 (b) 40 (c) 800 (d) 80
24. 24.Which is closest to 1802 ÷ 19? (a) 900 (b) 180 (c) 45 (d) 90
25. 25.Which is closest to 2796 ÷ 41? (a) 140 (b) 700 (c) 70 (d) 35
26. 26.Round 62.52 to one decimal place. =
27. 27.Which is closest to 397 × 88? (Round each number first.) (a) 36000 (b) 360000 (c) 72000 (d) 3600
28. 28.Which is closest to 400 × 68? (Round each number first.) (a) 2800 (b) 28000 (c) 56000 (d) 280000
29. 29.Which is closest to 2707 ÷ 29? (a) 45 (b) 90 (c) 180 (d) 900
30. 30.Which is closest to 598 × 21? (Round each number first.) (a) 24000 (b) 12000 (c) 1200 (d) 120000
31. 31.Which is closest to 4002 ÷ 51? (a) 80 (b) 800 (c) 40 (d) 160
32. 32.Round 33245 to the nearest hundred.
33. 33.Which is closest to 804 + 97 + 204? (a) 1200 (b) 1300 (c) 1000 (d) 1100
34. 34.Which is closest to 600 × 18? (Round each number first.) (a) 120000 (b) 24000 (c) 1200 (d) 12000
35. 35.Which is closest to 201 × 51? (Round each number first.) (a) 10000 (b) 1000 (c) 100000 (d) 20000
36. 36.Which is closest to 598 × 72? (Round each number first.) (a) 420000 (b) 4200 (c) 84000 (d) 42000
37. 37.Round 11918 to the nearest hundred.
38. 38.Which is closest to 3603 ÷ 41? (a) 900 (b) 90 (c) 45 (d) 180
39. 39.Round 74.22 to one decimal place. =
40. 40.Round 14034 to the nearest thousand.

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