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QUESTION
There are 1,000 mg in every gram. If something has a mass of 458 mg. what is the mass expressed in grams?
##1## ##mg## ##=## ##1xx10^-3*g##
##458## ##mg## ##=## ##458## ##cancel(mg)## ##xx## ##10^-3*g*cancel(mg^-1)## ##=## ##0.458*g##
