For med math, you have to know how to do the basic math such as adding fractions, subtracting fractions, decimals, percents, ratios and so on. I know for me it's been a while since I touch basic math so I need to review them. Luckily, there's a good website called Khan Academy that has videos on how to do these things.
They also have how to convert temperature from Celsius to Fahrenheit and vice versa.
It's a great website, so come and take a look at it.