Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 378 · 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 602 × 59? (Round each number first.) (a) 3600 (b) 36000 (c) 72000 (d) 360000
2. 2.Which is closest to 400 × 61? (Round each number first.) (a) 240000 (b) 24000 (c) 48000 (d) 2400
3. 3.Which is closest to 391 ÷ 19? (a) 20 (b) 40 (c) 10 (d) 200
4. 4.Round 4530 to the nearest hundred.
5. 5.Round 27.57 to one decimal place. =
6. 6.Which is closest to 398 + 697 + 496? (a) 1800 (b) 1700 (c) 1600 (d) 1500
7. 7.Which is closest to 899 × 59? (Round each number first.) (a) 54000 (b) 540000 (c) 5400 (d) 108000
8. 8.Which is closest to 299 + 501 + 203? (a) 900 (b) 1000 (c) 1200 (d) 1100
9. 9.Which is closest to 804 + 695 + 101? (a) 1500 (b) 1800 (c) 1600 (d) 1700
10. 10.Which is closest to 405 + 105 + 795? (a) 1200 (b) 1400 (c) 1300 (d) 1500
11. 11.Which is closest to 596 × 31? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
12. 12.Which is closest to 900 × 91? (Round each number first.) (a) 8100 (b) 81000 (c) 162000 (d) 810000
13. 13.Which is closest to 203 × 50? (Round each number first.) (a) 10000 (b) 1000 (c) 100000 (d) 20000
14. 14.Round 58713 to the nearest ten.
15. 15.Round 78.14 to one decimal place. =
16. 16.Round 27.36 to one decimal place. =
17. 17.Round 48199 to the nearest ten.
18. 18.Which is closest to 402 × 40? (Round each number first.) (a) 32000 (b) 16000 (c) 1600 (d) 160000
19. 19.Which is closest to 303 + 601 + 100? (a) 900 (b) 1200 (c) 1100 (d) 1000
20. 20.Which is closest to 503 × 70? (Round each number first.) (a) 35000 (b) 70000 (c) 3500 (d) 350000
21. 21.Which is closest to 199 + 902 + 696? (a) 1900 (b) 1700 (c) 1800 (d) 2000
22. 22.Round 9952 to the nearest ten.
23. 23.Which is closest to 596 ÷ 21? (a) 300 (b) 60 (c) 15 (d) 30
24. 24.Round 84274 to the nearest ten.
25. 25.Which is closest to 197 × 38? (Round each number first.) (a) 8000 (b) 80000 (c) 800 (d) 16000
26. 26.Which is closest to 195 + 701 + 795? (a) 1600 (b) 1900 (c) 1700 (d) 1800
27. 27.Which is closest to 499 × 41? (Round each number first.) (a) 2000 (b) 200000 (c) 40000 (d) 20000
28. 28.Which is closest to 400 + 205 + 901? (a) 1400 (b) 1500 (c) 1600 (d) 1700
29. 29.Which is closest to 897 + 705 + 604? (a) 2400 (b) 2100 (c) 2200 (d) 2300
30. 30.Which is closest to 802 + 795 + 595? (a) 2100 (b) 2300 (c) 2200 (d) 2400
31. 31.Which is closest to 697 × 59? (Round each number first.) (a) 84000 (b) 420000 (c) 42000 (d) 4200
32. 32.Which is closest to 994 ÷ 51? (a) 20 (b) 200 (c) 40 (d) 10
33. 33.Which is closest to 1795 ÷ 29? (a) 120 (b) 600 (c) 30 (d) 60
34. 34.Which is closest to 902 + 805 + 303? (a) 2000 (b) 2100 (c) 1900 (d) 2200
35. 35.Which is closest to 696 × 82? (Round each number first.) (a) 56000 (b) 560000 (c) 112000 (d) 5600
36. 36.Which is closest to 4503 ÷ 51? (a) 900 (b) 180 (c) 45 (d) 90
37. 37.Which is closest to 201 × 21? (Round each number first.) (a) 40000 (b) 400 (c) 8000 (d) 4000
38. 38.Round 24.87 to one decimal place. =
39. 39.Which is closest to 904 × 42? (Round each number first.) (a) 3600 (b) 36000 (c) 72000 (d) 360000
40. 40.Which is closest to 697 + 801 + 604? (a) 2200 (b) 2100 (c) 2300 (d) 2000

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