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rule for precision while measuring
estimate one digit
multiplying/dividing measurements
answer must contain same amt of sig figs as the number with the smallest amt of sig figs
adding/subtracting measurements
answer must contain same amt of decimal places as the number with the smallest amt of decimal places
integers in sig figs
all count as sig figs
captive zeros in sig figs
zeros between integers, always count as sig figs
trailing zeros in sig figs
zeros that come at the end of a number, only count if there is a decimal pt
exact numbers in sig figs
exact numbers (rather than measurements have an infinite number of sig figs
