Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 41 · 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 399 ÷ 19? (a) 10 (b) 200 (c) 20 (d) 40
2. 2.Which is closest to 598 × 28? (Round each number first.) (a) 1800 (b) 18000 (c) 36000 (d) 180000
3. 3.Which is closest to 1592 ÷ 19? (a) 800 (b) 40 (c) 160 (d) 80
4. 4.Which is closest to 201 + 895 + 805? (a) 1900 (b) 2100 (c) 2000 (d) 1800
5. 5.Which is closest to 1009 ÷ 49? (a) 40 (b) 10 (c) 200 (d) 20
6. 6.Which is closest to 697 × 18? (Round each number first.) (a) 28000 (b) 14000 (c) 140000 (d) 1400
7. 7.Which is closest to 204 × 58? (Round each number first.) (a) 120000 (b) 12000 (c) 1200 (d) 24000
8. 8.Round 22833 to the nearest hundred.
9. 9.Which is closest to 597 + 199 + 604? (a) 1400 (b) 1600 (c) 1500 (d) 1300
10. 10.Round 64438 to the nearest thousand.
11. 11.Round 47811 to the nearest ten.
12. 12.Round 24574 to the nearest hundred.
13. 13.Round 49128 to the nearest ten.
14. 14.Round 13556 to the nearest thousand.
15. 15.Round 50196 to the nearest thousand.
16. 16.Which is closest to 498 × 39? (Round each number first.) (a) 20000 (b) 200000 (c) 40000 (d) 2000
17. 17.Round 14.32 to one decimal place. =
18. 18.Round 7756 to the nearest ten.
19. 19.Which is closest to 799 + 805 + 297? (a) 1800 (b) 2100 (c) 1900 (d) 2000
20. 20.Which is closest to 598 × 71? (Round each number first.) (a) 4200 (b) 84000 (c) 42000 (d) 420000
21. 21.Which is closest to 197 × 29? (Round each number first.) (a) 6000 (b) 60000 (c) 12000 (d) 600
22. 22.Round 29.86 to one decimal place. =
23. 23.Which is closest to 606 ÷ 19? (a) 60 (b) 15 (c) 300 (d) 30
24. 24.Which is closest to 799 × 71? (Round each number first.) (a) 112000 (b) 560000 (c) 5600 (d) 56000
25. 25.Which is closest to 303 × 90? (Round each number first.) (a) 270000 (b) 2700 (c) 54000 (d) 27000
26. 26.Which is closest to 105 + 805 + 496? (a) 1300 (b) 1600 (c) 1400 (d) 1500
27. 27.Which is closest to 897 × 52? (Round each number first.) (a) 90000 (b) 450000 (c) 4500 (d) 45000
28. 28.Which is closest to 303 × 50? (Round each number first.) (a) 30000 (b) 150000 (c) 1500 (d) 15000
29. 29.Round 57.68 to one decimal place. =
30. 30.Which is closest to 900 × 92? (Round each number first.) (a) 810000 (b) 162000 (c) 81000 (d) 8100
31. 31.Round 60.84 to one decimal place. =
32. 32.Which is closest to 297 × 48? (Round each number first.) (a) 1500 (b) 150000 (c) 15000 (d) 30000
33. 33.Which is closest to 905 ÷ 31? (a) 300 (b) 15 (c) 60 (d) 30
34. 34.Which is closest to 896 × 48? (Round each number first.) (a) 450000 (b) 4500 (c) 90000 (d) 45000
35. 35.Round 66593 to the nearest thousand.
36. 36.Round 14.62 to one decimal place. =
37. 37.Round 33434 to the nearest hundred.
38. 38.Round 31.34 to one decimal place. =
39. 39.Round 86620 to the nearest hundred.
40. 40.Which is closest to 697 × 52? (Round each number first.) (a) 70000 (b) 350000 (c) 3500 (d) 35000

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