The four main components in Pharmacy Math are: Weight, Volume, Temperature and Time.
To prepare for the PTCB or ExCPT exam, it's recommended to know math enough to work out complex word problems and some algebra. Additionally, conversions are referred to in nearly all pharmacy tech math calculations.
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The most often asked question about pharmacy technician math is how to know which type of math to do for each problem. There really is no straight answer. In fact, many problems can be solved using more than one technique. Additionally, many pharmacy tech math problems require a few different types of math all within the same problem. The only way to get to a point where you feel more comfortable with math is through repetition. If you need help getting started on a math problem, take a look around the pharmacy tech math question forum.