It means subtraction, but it's sort of backward. 3 from 5 is the same as 5 minus 3.
A letter in math can stand for any number
Math is an abbreviation of mathematics: it is not an acronym. So the h does not stand for anything!
decigram
Abbreviation.
Centigrams
inches
the letter L can stand for a variable.
lower quartile(this is for math)
multiplication
it stands for milligrams
grams or gallon
multiply