Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 995 · 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 902 × 48? (Round each number first.) (a) 90000 (b) 45000 (c) 4500 (d) 450000
2. 2.Which is closest to 598 × 22? (Round each number first.) (a) 24000 (b) 12000 (c) 1200 (d) 120000
3. 3.Round 27.78 to one decimal place. =
4. 4.Which is closest to 298 × 70? (Round each number first.) (a) 42000 (b) 21000 (c) 210000 (d) 2100
5. 5.Round 25.41 to one decimal place. =
6. 6.Which is closest to 1191 ÷ 19? (a) 120 (b) 600 (c) 60 (d) 30
7. 7.Which is closest to 1595 ÷ 21? (a) 80 (b) 160 (c) 800 (d) 40
8. 8.Round 48029 to the nearest hundred.
9. 9.Which is closest to 2002 ÷ 49? (a) 400 (b) 80 (c) 40 (d) 20
10. 10.Round 97755 to the nearest thousand.
11. 11.Which is closest to 400 × 31? (Round each number first.) (a) 12000 (b) 120000 (c) 24000 (d) 1200
12. 12.Which is closest to 698 × 79? (Round each number first.) (a) 560000 (b) 112000 (c) 56000 (d) 5600
13. 13.Round 38.37 to one decimal place. =
14. 14.Which is closest to 396 × 62? (Round each number first.) (a) 48000 (b) 240000 (c) 24000 (d) 2400
15. 15.Which is closest to 1403 ÷ 19? (a) 140 (b) 35 (c) 70 (d) 700
16. 16.Round 43.89 to one decimal place. =
17. 17.Round 56506 to the nearest ten.
18. 18.Round 24268 to the nearest hundred.
19. 19.Which is closest to 104 + 697 + 102? (a) 1000 (b) 900 (c) 800 (d) 1100
20. 20.Which is closest to 299 + 695 + 396? (a) 1600 (b) 1300 (c) 1400 (d) 1500
21. 21.Round 69629 to the nearest hundred.
22. 22.Which is closest to 2001 ÷ 51? (a) 40 (b) 20 (c) 80 (d) 400
23. 23.Which is closest to 801 × 20? (Round each number first.) (a) 32000 (b) 1600 (c) 160000 (d) 16000
24. 24.Which is closest to 305 + 601 + 397? (a) 1200 (b) 1300 (c) 1400 (d) 1500
25. 25.Round 33833 to the nearest thousand.
26. 26.Which is closest to 702 × 88? (Round each number first.) (a) 63000 (b) 630000 (c) 126000 (d) 6300
27. 27.Which is closest to 297 × 30? (Round each number first.) (a) 18000 (b) 9000 (c) 90000 (d) 900
28. 28.Which is closest to 304 + 97 + 299? (a) 800 (b) 900 (c) 600 (d) 700
29. 29.Which is closest to 300 + 398 + 200? (a) 1100 (b) 800 (c) 1000 (d) 900
30. 30.Round 81136 to the nearest thousand.
31. 31.Which is closest to 503 + 303 + 895? (a) 1800 (b) 1600 (c) 1900 (d) 1700
32. 32.Which is closest to 104 + 902 + 197? (a) 1200 (b) 1400 (c) 1300 (d) 1100
33. 33.Which is closest to 699 + 297 + 598? (a) 1800 (b) 1500 (c) 1700 (d) 1600
34. 34.Round 17345 to the nearest hundred.
35. 35.Round 17433 to the nearest hundred.
36. 36.Round 58404 to the nearest hundred.
37. 37.Round 77117 to the nearest hundred.
38. 38.Which is closest to 896 + 695 + 799? (a) 2600 (b) 2400 (c) 2300 (d) 2500
39. 39.Which is closest to 705 + 202 + 599? (a) 1400 (b) 1500 (c) 1600 (d) 1700
40. 40.Round 16.59 to one decimal place. =

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