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Significant Figures Made Easy – Step 2 of 5

Identifying significant figures

In order to tell how many significant figures there are in a number, follow these basic rules.

Rule 1 Significant figures are the number of digits from the “first nonzero” to the “last position”.
Rule 2 The “Last Position” is the last number’s position if the measurement has a decimal point. Otherwise, the “last position” is the last non-zero’s position.

Now try them out.

Repeatedly enter a number and check how many significant figures it has:

Enter number:

Acknowledgement: Thanks to Larry Battle for the code and help.

Next step: Interactive Quiz


Have questions? See our compilation of questions and answers.