ࡱ> HJG ~bjbj 4:~::4tPPPPP+++giiiiii$p" L+++++PP+ PPg+g:,/PcUc5j S0Rn n /n /$++++++++++++++n +++++++++: Z: Answers to Significant Digit Worksheet: Give the number of significant digits in each of the following measurements: 1. 1 278.50 6 7. 8.002 4 13. 43.050 5 2. 120 000 2 8. 823.012 6 14. 0.147 3 3. 90 027.00 7 9. 0.005789 4 15. 6271.91 6 4. 0.0053567 5 10. 2.60 3 16. 6 1 5. 670 2 11. 542 000. 6 17. 3.47 3 6. 0.00730 3 12. 2 653 008.0 8 18. 387 465 6 Round off the following numbers to three significant digits: 19. 120 000 = 1.20 x 105 22. 4.53619 = 4.54 20. 5.457 = 5.46 23. 43.659 = 43.7 21. 0.0008769 = 0.000877 or 8.77 x 10-4 24. 876 493 = 876 000 or 8.76 x 105 Perform the following operations giving the proper number of significant figures in the answer. 25. 23.4 x 14 327.6 = 330 or 3.3 x 102 26. 7.895 + 3.4 11.295 = 11.3 27. 0.0945 x 1.47 0.138 915 = 0.139 28. 0.005 - 0.0007 0.0043 = 0.004 29. 7.895 / 34 0.232 205 882 = 0.23 30. 0.2 / 0.0005 400 = 400 or 4 x 102 31. (8.71 x 0.0301)/0.056 = 4.7 32. (7.6 x 104) (5.823 x 10-3) = 4.4 X 102 33. (4 x 972) + (76.4 x 29.3) (12 x 7) = 6x 103 34. (72.67 72.63) x (4.2694) = 0.02 (9.72 + 0.01) 35. 4.1 x 10-3 6.9 x 10-2 = 7.3 x 10-7 7.2 x 10-6 + 8.943 x 104 36. 10,000,000 x 0.0003845 x 4.55 = 4. x 109 4.331 x 10-6 Write each number in scientific notation. 0.07882 =7.882 10-20.00002786 =2.786 10-587200 =8.72 10474171.7 =7.41717 104450=4.5 102118000 =1.18 1050.0000085 =8.5 10-60.000000664 =6.64 10-70.00000272338 =2.72338 10-6770 =7.7 10262360 = 6.236 x 1040.000044547300 = 4.4547300 x 10-5500260 = 5.0026 x 1050.0000087038 = 8.7038x10-6 Write each number in standard format. 3.443 10-7 =0.00000034437.75763 10-7 =0.0000007757635.8 10-7 =0.000000581.525 106 =15250006.58157 107 =658157005.1821 10-4 =0.000518211.21 10-7 =0.0000001215.2314 10-7 =0.000000523147.141 10-5 =0.000071415.256 106 =5256000 )vw|     ! + 0 1 2 G K Q R Z [ ] ^ d f i j   6 ? hf >*OJQJhf 5B*OJQJphhf OJQJhf 5OJQJP()vw" _ ! 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