Well I did think of those but, Math itself is a Academic discipline in literacy so reading, writing etc does not count as opposites because they are also disciplines in literacy.
So to be honest I wanted to say Mathematical illiteracy or something along those lines to explain the opposite of a literal discipline as you had presented it as a noun and not a verb, too which I ran in to struggle because its hard to explain the absence of a noun which in turn leaves a type of vacuum (like trying to explain a negative) for example what do I call something that is the opposite of a Tiger, the answer is there is no opposite to a Tiger there is just a Tiger or there is no Tiger, its the same with Maths, what is the opposite of Maths the answer "No Maths"