Mathematics

If you shorten the word 'Mathematics' that makes Maths', not 'Math'.

Comedian Milton Jones describes his experience with a friend who keeps saying 'You do the Math':

Friend: ...you do the Math.
Milton: Don't you mean Maths? There are five letters in that word.
Friend: What's the difference?
Milton: One. You do the Math...s.


Maybe that's why Biff kept 'flunking Math' in Death of a Salesman (although the name probably didn't help- see yesterday)