[nobody9999]

>I think its funny that terms like math v maths come about very organically and then after the fact everyone feels the need to back into a reasoning that was likely never there. Obviously neither are wrong because they are the "correct" way for a given dialect/region etc.

We Americans use the phrase "do the math," which means to go figure something out, not necessarily arithmetically.

Is there a similar phrase for the Brits? As in "do the maths?" Which seems unlikely. As such, I'd expect those using British style English to have different phrase for the same thing. Is that the case? If so, what might it be?

[foldr]

We just say 'do the math'. But yes, it's an American phrase. There's no direct British equivalent.