Sig Figs

what is a sig fig

digits that are significant in given numbers

rules

all non-zero # are significant (1.25 3sig fig)

zeros in the middle of non-zero numbers are significant (5.003 4 sig figs 

zero after the decimal are significant (43.000 5 sig figs)

zeros and coefficients in scientific notation are significant( 8.0 × 10³ 2sig figs

leading or beginning zeros not significant (0.00123 3sig fig)

zeros in a large number without a decimal are not significant (4000 1 sig fig)

multiplying/ dividing sig figs

look for the least amount of sig figs whatever number has the least number of sig figs is how many sig figs your answer will have.

adding/ substacting sig figs

look for the least amount of decimal places

rule for all sig-figs

MATH first, sig-figs After