Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 84 · 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 402 × 69? (Round each number first.) (a) 2800 (b) 280000 (c) 56000 (d) 28000
2. 2.Which is closest to 398 × 52? (Round each number first.) (a) 2000 (b) 40000 (c) 20000 (d) 200000
3. 3.Round 78617 to the nearest hundred.
4. 4.Which is closest to 403 × 50? (Round each number first.) (a) 40000 (b) 20000 (c) 200000 (d) 2000
5. 5.Round 32.29 to one decimal place. =
6. 6.Which is closest to 302 × 92? (Round each number first.) (a) 2700 (b) 27000 (c) 54000 (d) 270000
7. 7.Round 96.34 to one decimal place. =
8. 8.Which is closest to 801 + 397 + 497? (a) 1800 (b) 1900 (c) 1600 (d) 1700
9. 9.Round 54.86 to one decimal place. =
10. 10.Which is closest to 295 + 205 + 402? (a) 1100 (b) 800 (c) 900 (d) 1000
11. 11.Round 79404 to the nearest thousand.
12. 12.Which is closest to 1491 ÷ 29? (a) 25 (b) 500 (c) 50 (d) 100
13. 13.Which is closest to 1205 ÷ 31? (a) 80 (b) 400 (c) 20 (d) 40
14. 14.Which is closest to 697 × 89? (Round each number first.) (a) 126000 (b) 630000 (c) 63000 (d) 6300
15. 15.Round 28219 to the nearest thousand.
16. 16.Which is closest to 397 × 38? (Round each number first.) (a) 1600 (b) 160000 (c) 16000 (d) 32000
17. 17.Which is closest to 396 × 31? (Round each number first.) (a) 120000 (b) 12000 (c) 24000 (d) 1200
18. 18.Which is closest to 601 + 504 + 204? (a) 1500 (b) 1400 (c) 1300 (d) 1200
19. 19.Which is closest to 298 × 32? (Round each number first.) (a) 18000 (b) 90000 (c) 9000 (d) 900
20. 20.Round 12148 to the nearest hundred.
21. 21.Round 15.09 to one decimal place. =
22. 22.Which is closest to 795 + 800 + 698? (a) 2300 (b) 2200 (c) 2400 (d) 2500
23. 23.Which is closest to 304 × 19? (Round each number first.) (a) 600 (b) 60000 (c) 12000 (d) 6000
24. 24.Round 87.43 to one decimal place. =
25. 25.Round 91.47 to one decimal place. =
26. 26.Which is closest to 298 × 61? (Round each number first.) (a) 180000 (b) 36000 (c) 18000 (d) 1800
27. 27.Round 86.51 to one decimal place. =
28. 28.Which is closest to 499 + 400 + 395? (a) 1500 (b) 1200 (c) 1400 (d) 1300
29. 29.Round 9209 to the nearest hundred.
30. 30.Round 74408 to the nearest thousand.
31. 31.Which is closest to 203 × 41? (Round each number first.) (a) 80000 (b) 800 (c) 8000 (d) 16000
32. 32.Which is closest to 404 × 58? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
33. 33.Which is closest to 897 + 400 + 705? (a) 2100 (b) 2200 (c) 2000 (d) 1900
34. 34.Round 9438 to the nearest ten.
35. 35.Which is closest to 504 + 96 + 302? (a) 1000 (b) 1100 (c) 900 (d) 800
36. 36.Round 85.56 to one decimal place. =
37. 37.Which is closest to 296 × 70? (Round each number first.) (a) 21000 (b) 42000 (c) 2100 (d) 210000
38. 38.Which is closest to 599 × 88? (Round each number first.) (a) 108000 (b) 540000 (c) 5400 (d) 54000
39. 39.Round 3943 to the nearest thousand.
40. 40.Which is closest to 4504 ÷ 49? (a) 90 (b) 180 (c) 900 (d) 45

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