Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 980 · 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 198 × 70? (Round each number first.) (a) 28000 (b) 140000 (c) 1400 (d) 14000
2. 2.Round 70152 to the nearest ten.
3. 3.Round 27512 to the nearest ten.
4. 4.Which is closest to 1492 ÷ 51? (a) 60 (b) 15 (c) 30 (d) 300
5. 5.Round 36.51 to one decimal place. =
6. 6.Round 47519 to the nearest ten.
7. 7.Which is closest to 98 + 600 + 700? (a) 1600 (b) 1400 (c) 1300 (d) 1500
8. 8.Which is closest to 197 × 68? (Round each number first.) (a) 14000 (b) 28000 (c) 140000 (d) 1400
9. 9.Which is closest to 198 + 202 + 898? (a) 1500 (b) 1300 (c) 1400 (d) 1200
10. 10.Round 60.91 to one decimal place. =
11. 11.Which is closest to 3603 ÷ 41? (a) 900 (b) 180 (c) 90 (d) 45
12. 12.Which is closest to 399 × 59? (Round each number first.) (a) 240000 (b) 48000 (c) 24000 (d) 2400
13. 13.Which is closest to 297 × 40? (Round each number first.) (a) 12000 (b) 1200 (c) 120000 (d) 24000
14. 14.Which is closest to 297 × 30? (Round each number first.) (a) 18000 (b) 9000 (c) 90000 (d) 900
15. 15.Which is closest to 601 + 502 + 402? (a) 1700 (b) 1400 (c) 1500 (d) 1600
16. 16.Round 34.56 to one decimal place. =
17. 17.Which is closest to 1207 ÷ 29? (a) 80 (b) 400 (c) 40 (d) 20
18. 18.Which is closest to 697 + 703 + 404? (a) 1900 (b) 2000 (c) 1800 (d) 1700
19. 19.Round 28.09 to one decimal place. =
20. 20.Round 68534 to the nearest hundred.
21. 21.Which is closest to 598 × 38? (Round each number first.) (a) 24000 (b) 2400 (c) 48000 (d) 240000
22. 22.Round 89994 to the nearest thousand.
23. 23.Round 12431 to the nearest hundred.
24. 24.Round 28.44 to one decimal place. =
25. 25.Round 84.87 to one decimal place. =
26. 26.Which is closest to 603 × 70? (Round each number first.) (a) 42000 (b) 420000 (c) 84000 (d) 4200
27. 27.Which is closest to 203 + 95 + 504? (a) 900 (b) 1000 (c) 700 (d) 800
28. 28.Which is closest to 3209 ÷ 39? (a) 40 (b) 800 (c) 160 (d) 80
29. 29.Which is closest to 99 + 298 + 198? (a) 500 (b) 700 (c) 600 (d) 800
30. 30.Round 13.63 to one decimal place. =
31. 31.Which is closest to 800 × 28? (Round each number first.) (a) 48000 (b) 2400 (c) 240000 (d) 24000
32. 32.Round 33011 to the nearest thousand.
33. 33.Which is closest to 1793 ÷ 31? (a) 30 (b) 600 (c) 60 (d) 120
34. 34.Round 63021 to the nearest ten.
35. 35.Round 99.86 to one decimal place. =
36. 36.Which is closest to 600 + 404 + 797? (a) 2000 (b) 1700 (c) 1800 (d) 1900
37. 37.Which is closest to 1196 ÷ 29? (a) 20 (b) 80 (c) 400 (d) 40
38. 38.Which is closest to 296 × 49? (Round each number first.) (a) 1500 (b) 150000 (c) 30000 (d) 15000
39. 39.Which is closest to 699 + 99 + 500? (a) 1200 (b) 1300 (c) 1500 (d) 1400
40. 40.Which is closest to 302 × 70? (Round each number first.) (a) 210000 (b) 21000 (c) 42000 (d) 2100

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