Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 507 · 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 793 ÷ 21? (a) 40 (b) 20 (c) 400 (d) 80
2. 2.Which is closest to 597 + 504 + 598? (a) 1900 (b) 1800 (c) 1700 (d) 1600
3. 3.Which is closest to 601 × 32? (Round each number first.) (a) 180000 (b) 36000 (c) 18000 (d) 1800
4. 4.Round 32268 to the nearest ten.
5. 5.Round 36138 to the nearest thousand.
6. 6.Which is closest to 796 × 48? (Round each number first.) (a) 4000 (b) 400000 (c) 40000 (d) 80000
7. 7.Round 20.56 to one decimal place. =
8. 8.Which is closest to 802 × 60? (Round each number first.) (a) 4800 (b) 48000 (c) 480000 (d) 96000
9. 9.Which is closest to 1993 ÷ 41? (a) 500 (b) 25 (c) 100 (d) 50
10. 10.Which is closest to 300 + 600 + 297? (a) 1300 (b) 1100 (c) 1400 (d) 1200
11. 11.Which is closest to 204 × 41? (Round each number first.) (a) 800 (b) 16000 (c) 80000 (d) 8000
12. 12.Which is closest to 99 + 302 + 97? (a) 400 (b) 600 (c) 700 (d) 500
13. 13.Which is closest to 896 × 92? (Round each number first.) (a) 8100 (b) 81000 (c) 810000 (d) 162000
14. 14.Which is closest to 701 × 69? (Round each number first.) (a) 4900 (b) 98000 (c) 490000 (d) 49000
15. 15.Which is closest to 295 + 401 + 397? (a) 1200 (b) 1300 (c) 1100 (d) 1000
16. 16.Round 23.86 to one decimal place. =
17. 17.Round 50017 to the nearest ten.
18. 18.Which is closest to 197 × 30? (Round each number first.) (a) 600 (b) 12000 (c) 6000 (d) 60000
19. 19.Which is closest to 902 + 505 + 599? (a) 2100 (b) 2200 (c) 1900 (d) 2000
20. 20.Which is closest to 795 + 699 + 905? (a) 2300 (b) 2400 (c) 2500 (d) 2600
21. 21.Which is closest to 604 × 61? (Round each number first.) (a) 3600 (b) 36000 (c) 360000 (d) 72000
22. 22.Round 15858 to the nearest ten.
23. 23.Which is closest to 497 + 599 + 601? (a) 1600 (b) 1800 (c) 1900 (d) 1700
24. 24.Round 30072 to the nearest ten.
25. 25.Round 86.67 to one decimal place. =
26. 26.Which is closest to 702 × 21? (Round each number first.) (a) 28000 (b) 14000 (c) 1400 (d) 140000
27. 27.Round 14.56 to one decimal place. =
28. 28.Which is closest to 803 + 398 + 502? (a) 1900 (b) 1600 (c) 1700 (d) 1800
29. 29.Which is closest to 1194 ÷ 21? (a) 600 (b) 120 (c) 60 (d) 30
30. 30.Which is closest to 196 × 90? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
31. 31.Which is closest to 104 + 205 + 300? (a) 700 (b) 800 (c) 600 (d) 500
32. 32.Which is closest to 298 + 296 + 705? (a) 1200 (b) 1400 (c) 1500 (d) 1300
33. 33.Which is closest to 592 ÷ 29? (a) 20 (b) 200 (c) 10 (d) 40
34. 34.Which is closest to 1497 ÷ 49? (a) 30 (b) 15 (c) 300 (d) 60
35. 35.Round 84.71 to one decimal place. =
36. 36.Which is closest to 595 + 300 + 498? (a) 1400 (b) 1500 (c) 1300 (d) 1600
37. 37.Which is closest to 196 × 22? (Round each number first.) (a) 400 (b) 40000 (c) 4000 (d) 8000
38. 38.Which is closest to 3195 ÷ 39? (a) 80 (b) 800 (c) 40 (d) 160
39. 39.Which is closest to 503 + 703 + 599? (a) 1900 (b) 1800 (c) 1700 (d) 2000
40. 40.Which is closest to 503 × 22? (Round each number first.) (a) 20000 (b) 10000 (c) 1000 (d) 100000

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude