Significant Digits

Learning and practicing the rules for significant figures!

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Rules for Significant Figures

Rules for Significant Figures

There are three rules on determining how many significant figures are in a number:

  1. Non-zero digits are always significant.
  2. Any zeros between two significant digits are significant.
  3. A final zero or trailing zeros in the decimal portion ONLY are significant.

Practice for Significant Figures

How many significant figures does the following number have?  0.020430

5 significant figures

4 significant figures