Counting Significant Figures (page 4 of 5)

How do we identify the number of significant figures in a measurement?

• First Rule: All non-zero digits are significant.
• Second Rule: None
• Third Rule: None

Check Yourself - Identify the number of significant figures in each of the following:

1. 0.0030700 has ___________ significant figures according to rules ___________ .


2. 10,020,000 has ___________ significant figures according to rules ___________ .


3. 5.00 has ___________ significant figures according to rules ___________ .

(Hover over the lines to check your thinking).