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Mastering Significant Figures: Improve Measurement Precision

Understand how to count significant figures and apply rules for multiplying, dividing, adding, and subtracting measurements with precision. Learn about exact numbers, rules for rounding, and the importance of significant figures in lab work.

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Mastering Significant Figures: Improve Measurement Precision

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  1. Significant Figures Making Your Measurements Count

  2. Significant Figures • All of the numbers I know for sure… + 1 estimate.

  3. How do we count Sig Figs? • Measurements • Non Zero #s • Zeros • Trapped Zeros • Leading Zeros • Trailing Zeros • Decimal Point present • Decimal Point absent

  4. How do we count Sig Figs? • Exact Numbers (Counted items and some conversion factors) • Unlimited or Infinite Significance

  5. Rules For Multiplying and Dividing • The Weak Link Rule • Your answer must have the same number of significant figures as the number in the operation which has the ___________ ___________ of significant figures. • Remember how to round!!

  6. Rules For Adding and Subtracting • The Weak Link Rule • Your answer must have the same number of ______________________as the number in the operation which has the _________ __________ of _____________________. • Why the add/subtract rule is seldom used in lab. • Why it is used in % error calculations.

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