[a_shovel]

How much is one math, anyways? Is it an equation, or a plus or minus sign, or a number, or what? For that matter, how much math is five maths?

[electroly]

As an American who doesn't say "maths", my assumption is that algebra is one math, geometry is another, calculus is one, discrete math is one, etc. Together, they are "the maths."

Probably a "just so" definition to satisfy my American ears. I bet they'd say that any one of those is still "maths" by itself.

[yamtaddle]

Looks like we'll need some math to sort out all these maths!