Journal 8/27/14 - PowerPoint PPT Presentation

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Journal 8/27/14
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Journal 8/27/14

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  1. Journal 8/27/14 Why do you think we care about significant figures? What use are they? Objective Tonight’s Homework To practice in working with significant figures none

  2. Practicing Significant Figures Let’s practice more sig figs: 1) 49.1845 - 9.596 2) 15.878 + 5.31 + 54.4 3) 85.66 + 5.28 4) 3.2 - 2.311 5) 4.3 + 46.41 + 2.48 6) 4.3716 + 84.6 + 59.194 7) 89.657 - 5.226 8) 1300 ÷ 1.8 9) 402 ÷ 7.0 10) 24.60 x 1.56 11) 0.45 x 4.682 x 406 12) 0.0082 x 437 13) 3 x 13 x 330 14) 5 x 3.14 15) 4.2 x 95 16) 3.759 x 5.294 x 8600 17) 99 x 2 x 709 18) 6 x 0.2 19) 2000 ÷ 36.73 20) 0.067 x 0.030

  3. Practicing Significant Figures Answers 1) 39.589 2) 75.6 3) 90.94 4) 0.9 5) 53.2 6) 148.2 7) 84.431 8) 720 9) 57 10) 38.4 11) 860 12) 3.58 13) 10,000 14) 20 15) 400 (tricky! Round up!) 16) 170,000 17) 100,000 18) 1 19) 50 20) 0.002

  4. Exit Question #7 Multiply 0.00030 by 18.2 a) 0 b) 0.01 c) 0.005 d) 0.0055 e) 0.00546