Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 153 · 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 4008 ÷ 51? (a) 80 (b) 40 (c) 800 (d) 160
2. 2.Round 18.77 to one decimal place. =
3. 3.Which is closest to 198 × 80? (Round each number first.) (a) 160000 (b) 32000 (c) 16000 (d) 1600
4. 4.Round 24440 to the nearest hundred.
5. 5.Round 56307 to the nearest thousand.
6. 6.Which is closest to 597 ÷ 19? (a) 300 (b) 15 (c) 60 (d) 30
7. 7.Which is closest to 1196 ÷ 19? (a) 30 (b) 600 (c) 120 (d) 60
8. 8.Which is closest to 201 × 88? (Round each number first.) (a) 180000 (b) 18000 (c) 1800 (d) 36000
9. 9.Round 42924 to the nearest hundred.
10. 10.Round 40487 to the nearest thousand.
11. 11.Which is closest to 798 × 39? (Round each number first.) (a) 3200 (b) 320000 (c) 32000 (d) 64000
12. 12.Which is closest to 303 × 38? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
13. 13.Round 41633 to the nearest thousand.
14. 14.Round 20.56 to one decimal place. =
15. 15.Round 8385 to the nearest hundred.
16. 16.Which is closest to 297 + 896 + 296? (a) 1600 (b) 1400 (c) 1500 (d) 1700
17. 17.Round 5144 to the nearest thousand.
18. 18.Round 22.34 to one decimal place. =
19. 19.Which is closest to 401 × 42? (Round each number first.) (a) 16000 (b) 1600 (c) 160000 (d) 32000
20. 20.Which is closest to 3600 ÷ 41? (a) 180 (b) 90 (c) 900 (d) 45
21. 21.Which is closest to 99 + 295 + 800? (a) 1200 (b) 1100 (c) 1400 (d) 1300
22. 22.Round 62219 to the nearest ten.
23. 23.Round 1201 to the nearest thousand.
24. 24.Round 91.79 to one decimal place. =
25. 25.Round 23779 to the nearest ten.
26. 26.Round 70.87 to one decimal place. =
27. 27.Which is closest to 703 × 69? (Round each number first.) (a) 49000 (b) 490000 (c) 98000 (d) 4900
28. 28.Which is closest to 1607 ÷ 39? (a) 20 (b) 400 (c) 80 (d) 40
29. 29.Round 27.39 to one decimal place. =
30. 30.Which is closest to 1002 ÷ 21? (a) 25 (b) 100 (c) 500 (d) 50
31. 31.Which is closest to 602 × 28? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
32. 32.Which is closest to 902 + 605 + 897? (a) 2600 (b) 2500 (c) 2300 (d) 2400
33. 33.Which is closest to 798 ÷ 39? (a) 200 (b) 10 (c) 40 (d) 20
34. 34.Which is closest to 296 × 79? (Round each number first.) (a) 48000 (b) 2400 (c) 24000 (d) 240000
35. 35.Round 30.38 to one decimal place. =
36. 36.Which is closest to 302 × 40? (Round each number first.) (a) 1200 (b) 24000 (c) 120000 (d) 12000
37. 37.Round 23313 to the nearest ten.
38. 38.Round 58828 to the nearest hundred.
39. 39.Round 41267 to the nearest ten.
40. 40.Round 54.23 to one decimal place. =

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