Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 958 · 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 700 × 29? (Round each number first.) (a) 42000 (b) 21000 (c) 210000 (d) 2100
2. 2.Which is closest to 3994 ÷ 51? (a) 40 (b) 80 (c) 160 (d) 800
3. 3.Round 92.58 to one decimal place. =
4. 4.Which is closest to 202 × 91? (Round each number first.) (a) 1800 (b) 18000 (c) 36000 (d) 180000
5. 5.Which is closest to 595 ÷ 19? (a) 15 (b) 300 (c) 30 (d) 60
6. 6.Round 70.44 to one decimal place. =
7. 7.Which is closest to 904 + 804 + 598? (a) 2300 (b) 2500 (c) 2400 (d) 2200
8. 8.Round 74.06 to one decimal place. =
9. 9.Round 45766 to the nearest hundred.
10. 10.Which is closest to 2099 ÷ 29? (a) 140 (b) 35 (c) 70 (d) 700
11. 11.Which is closest to 700 × 92? (Round each number first.) (a) 63000 (b) 630000 (c) 6300 (d) 126000
12. 12.Which is closest to 203 + 101 + 101? (a) 300 (b) 400 (c) 600 (d) 500
13. 13.Which is closest to 298 × 61? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
14. 14.Round 99.82 to one decimal place. =
15. 15.Which is closest to 800 + 802 + 196? (a) 1800 (b) 2000 (c) 1700 (d) 1900
16. 16.Round 51.06 to one decimal place. =
17. 17.Which is closest to 399 × 51? (Round each number first.) (a) 20000 (b) 2000 (c) 40000 (d) 200000
18. 18.Which is closest to 399 × 29? (Round each number first.) (a) 24000 (b) 120000 (c) 12000 (d) 1200
19. 19.Which is closest to 596 × 88? (Round each number first.) (a) 54000 (b) 5400 (c) 540000 (d) 108000
20. 20.Round 45.59 to one decimal place. =
21. 21.Which is closest to 4000 ÷ 49? (a) 80 (b) 160 (c) 40 (d) 800
22. 22.Which is closest to 901 × 70? (Round each number first.) (a) 630000 (b) 6300 (c) 126000 (d) 63000
23. 23.Which is closest to 1196 ÷ 19? (a) 30 (b) 60 (c) 120 (d) 600
24. 24.Which is closest to 796 × 18? (Round each number first.) (a) 1600 (b) 16000 (c) 160000 (d) 32000
25. 25.Round 16865 to the nearest thousand.
26. 26.Round 11678 to the nearest hundred.
27. 27.Round 24.19 to one decimal place. =
28. 28.Round 52867 to the nearest ten.
29. 29.Which is closest to 1200 ÷ 21? (a) 60 (b) 600 (c) 120 (d) 30
30. 30.Which is closest to 605 + 105 + 596? (a) 1200 (b) 1300 (c) 1500 (d) 1400
31. 31.Which is closest to 400 × 32? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
32. 32.Which is closest to 302 × 39? (Round each number first.) (a) 120000 (b) 1200 (c) 24000 (d) 12000
33. 33.Which is closest to 302 × 78? (Round each number first.) (a) 24000 (b) 2400 (c) 48000 (d) 240000
34. 34.Which is closest to 1195 ÷ 31? (a) 80 (b) 20 (c) 400 (d) 40
35. 35.Which is closest to 598 × 70? (Round each number first.) (a) 42000 (b) 420000 (c) 84000 (d) 4200
36. 36.Which is closest to 900 × 18? (Round each number first.) (a) 1800 (b) 180000 (c) 36000 (d) 18000
37. 37.Which is closest to 704 + 404 + 605? (a) 1800 (b) 1700 (c) 1600 (d) 1900
38. 38.Which is closest to 798 × 30? (Round each number first.) (a) 2400 (b) 48000 (c) 24000 (d) 240000
39. 39.Which is closest to 904 × 69? (Round each number first.) (a) 630000 (b) 63000 (c) 126000 (d) 6300
40. 40.Which is closest to 300 + 496 + 697? (a) 1400 (b) 1700 (c) 1600 (d) 1500

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