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

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 =

Significant Figure Practice

http://science.widener.edu/svb/tutorial/sigfigures.html

http://antoine.frostburg.edu/chem/senese/101/measurement/sigfig-quiz.shtml