I suck at math.  On a primal, dismal, below the surface level.  Adding and subtracting are important so you can check your bank accounts.  Fractions are important when you’re baking cakes.  Simple fractions that is, like 1/4, 1/2, 3/4 and MAYBE a sneaky 1/3 or 2/3 if you feel like getting fancy.  Division is important…