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Counting Significant Figures

This guide provides a comprehensive overview of significant figures, including how to count them with and without decimals. Learn the essential rules for adding, subtracting, multiplying, and dividing numbers while maintaining the correct number of significant figures. Engage with practical examples and try out exercises to enhance your understanding. Helpful resources are linked for additional practice. Ensure accuracy in your calculations by mastering the art of significant figures and become confident in scientific measurements and mathematics.

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Counting Significant Figures

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  1. Counting Significant Figures • Counting: • With a decimal: • Without a decimal: • Try these!! • Extra Practice: • http://science.widener.edu/svb/tutorial/sigfigures.html • http://antoine.frostburg.edu/chem/senese/101/measurement/sigfig-quiz.shtml

  2. Rules of Significant Figures • Use http://en.wikipedia.org/wiki/Significance_arithmetic • How do we know how many figures (numbers) to write when we are adding or subracting 2 or more numbers? • Using this information, find the answer to the following: • 2.1 + 2.11 = • 15 + 5 + 6.12= • 86.232 – 5.00 = • How do we know how many figures (numbers) to write when we are multiplying or dividing 2 or more numbers? • Using this information, find the answer to the following: • 35.72 (0.00590) = • 6810.2 / 2.4 = • 4450 ÷ 5.00 =

  3. Significant Figure Practice • http://science.widener.edu/svb/tutorial/sigfigures.html • http://antoine.frostburg.edu/chem/senese/101/measurement/sigfig-quiz.shtml

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