Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 174 · 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 698 × 68? (Round each number first.) (a) 490000 (b) 49000 (c) 98000 (d) 4900
2. 2.Which is closest to 1500 ÷ 29? (a) 100 (b) 500 (c) 50 (d) 25
3. 3.Round 53006 to the nearest thousand.
4. 4.Round 60.59 to one decimal place. =
5. 5.Which is closest to 1495 ÷ 51? (a) 15 (b) 300 (c) 30 (d) 60
6. 6.Round 80.87 to one decimal place. =
7. 7.Which is closest to 699 × 41? (Round each number first.) (a) 2800 (b) 56000 (c) 28000 (d) 280000
8. 8.Round 22.44 to one decimal place. =
9. 9.Which is closest to 198 × 79? (Round each number first.) (a) 32000 (b) 16000 (c) 1600 (d) 160000
10. 10.Which is closest to 196 × 20? (Round each number first.) (a) 400 (b) 4000 (c) 40000 (d) 8000
11. 11.Which is closest to 1206 ÷ 39? (a) 60 (b) 300 (c) 30 (d) 15
12. 12.Round 36718 to the nearest ten.
13. 13.Round 13810 to the nearest hundred.
14. 14.Round 21169 to the nearest ten.
15. 15.Round 27814 to the nearest hundred.
16. 16.Round 78617 to the nearest hundred.
17. 17.Round 14.48 to one decimal place. =
18. 18.Which is closest to 601 + 105 + 502? (a) 1200 (b) 1100 (c) 1400 (d) 1300
19. 19.Which is closest to 195 + 198 + 795? (a) 1200 (b) 1300 (c) 1400 (d) 1100
20. 20.Which is closest to 905 + 700 + 196? (a) 1900 (b) 1800 (c) 1700 (d) 2000
21. 21.Round 89439 to the nearest hundred.
22. 22.Which is closest to 701 × 80? (Round each number first.) (a) 56000 (b) 560000 (c) 5600 (d) 112000
23. 23.Which is closest to 901 + 104 + 798? (a) 1800 (b) 2000 (c) 1900 (d) 1700
24. 24.Round 43.07 to one decimal place. =
25. 25.Round 27512 to the nearest ten.
26. 26.Which is closest to 203 + 896 + 802? (a) 2000 (b) 1900 (c) 2100 (d) 1800
27. 27.Round 97021 to the nearest ten.
28. 28.Which is closest to 991 ÷ 19? (a) 25 (b) 500 (c) 50 (d) 100
29. 29.Which is closest to 101 + 795 + 602? (a) 1500 (b) 1400 (c) 1600 (d) 1700
30. 30.Round 17534 to the nearest hundred.
31. 31.Which is closest to 497 × 68? (Round each number first.) (a) 70000 (b) 350000 (c) 35000 (d) 3500
32. 32.Which is closest to 1600 ÷ 41? (a) 80 (b) 400 (c) 20 (d) 40
33. 33.Which is closest to 201 + 498 + 101? (a) 900 (b) 700 (c) 1000 (d) 800
34. 34.Which is closest to 502 + 605 + 101? (a) 1300 (b) 1400 (c) 1100 (d) 1200
35. 35.Which is closest to 796 ÷ 21? (a) 400 (b) 20 (c) 80 (d) 40
36. 36.Round 44.92 to one decimal place. =
37. 37.Which is closest to 402 × 91? (Round each number first.) (a) 36000 (b) 72000 (c) 360000 (d) 3600
38. 38.Round 97.93 to one decimal place. =
39. 39.Which is closest to 994 ÷ 49? (a) 10 (b) 40 (c) 200 (d) 20
40. 40.Round 84.21 to one decimal place. =

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