Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 29 · 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 596 × 88? (Round each number first.) (a) 108000 (b) 540000 (c) 5400 (d) 54000
2. 2.Round 69.77 to one decimal place. =
3. 3.Which is closest to 3003 ÷ 49? (a) 600 (b) 30 (c) 60 (d) 120
4. 4.Which is closest to 201 + 504 + 702? (a) 1500 (b) 1300 (c) 1400 (d) 1600
5. 5.Which is closest to 1191 ÷ 31? (a) 80 (b) 20 (c) 400 (d) 40
6. 6.Which is closest to 702 + 195 + 299? (a) 1100 (b) 1400 (c) 1300 (d) 1200
7. 7.Which is closest to 302 × 59? (Round each number first.) (a) 180000 (b) 36000 (c) 18000 (d) 1800
8. 8.Which is closest to 204 × 70? (Round each number first.) (a) 28000 (b) 1400 (c) 140000 (d) 14000
9. 9.Round 77.36 to one decimal place. =
10. 10.Which is closest to 300 × 52? (Round each number first.) (a) 30000 (b) 15000 (c) 150000 (d) 1500
11. 11.Which is closest to 197 × 82? (Round each number first.) (a) 160000 (b) 32000 (c) 16000 (d) 1600
12. 12.Round 29593 to the nearest hundred.
13. 13.Which is closest to 199 × 71? (Round each number first.) (a) 140000 (b) 1400 (c) 28000 (d) 14000
14. 14.Round 20706 to the nearest thousand.
15. 15.Which is closest to 503 × 72? (Round each number first.) (a) 70000 (b) 3500 (c) 35000 (d) 350000
16. 16.Which is closest to 299 × 31? (Round each number first.) (a) 900 (b) 18000 (c) 9000 (d) 90000
17. 17.Which is closest to 295 + 202 + 797? (a) 1200 (b) 1300 (c) 1400 (d) 1500
18. 18.Which is closest to 2699 ÷ 31? (a) 900 (b) 90 (c) 45 (d) 180
19. 19.Which is closest to 1506 ÷ 51? (a) 300 (b) 15 (c) 60 (d) 30
20. 20.Which is closest to 698 + 95 + 195? (a) 1000 (b) 1200 (c) 1100 (d) 900
21. 21.Which is closest to 599 × 42? (Round each number first.) (a) 24000 (b) 240000 (c) 48000 (d) 2400
22. 22.Which is closest to 902 × 50? (Round each number first.) (a) 4500 (b) 45000 (c) 90000 (d) 450000
23. 23.Which is closest to 902 × 19? (Round each number first.) (a) 180000 (b) 36000 (c) 18000 (d) 1800
24. 24.Round 22.37 to one decimal place. =
25. 25.Which is closest to 902 + 198 + 702? (a) 1700 (b) 2000 (c) 1900 (d) 1800
26. 26.Round 35.46 to one decimal place. =
27. 27.Which is closest to 398 × 21? (Round each number first.) (a) 8000 (b) 80000 (c) 800 (d) 16000
28. 28.Which is closest to 798 ÷ 19? (a) 20 (b) 400 (c) 40 (d) 80
29. 29.Which is closest to 298 × 89? (Round each number first.) (a) 54000 (b) 270000 (c) 27000 (d) 2700
30. 30.Round 24.31 to one decimal place. =
31. 31.Round 12852 to the nearest hundred.
32. 32.Which is closest to 499 × 30? (Round each number first.) (a) 150000 (b) 15000 (c) 30000 (d) 1500
33. 33.Which is closest to 498 × 91? (Round each number first.) (a) 45000 (b) 4500 (c) 90000 (d) 450000
34. 34.Round 92495 to the nearest hundred.
35. 35.Which is closest to 901 × 89? (Round each number first.) (a) 162000 (b) 8100 (c) 81000 (d) 810000
36. 36.Which is closest to 302 × 38? (Round each number first.) (a) 120000 (b) 1200 (c) 24000 (d) 12000
37. 37.Round 77061 to the nearest hundred.
38. 38.Which is closest to 604 + 400 + 599? (a) 1500 (b) 1700 (c) 1800 (d) 1600
39. 39.Which is closest to 1206 ÷ 39? (a) 30 (b) 15 (c) 300 (d) 60
40. 40.Which is closest to 903 + 798 + 897? (a) 2600 (b) 2800 (c) 2700 (d) 2500

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