math (n.1) Look up math at Dictionary.com
American English shortening of mathematics, 1890; the British preference, maths, is attested from 1911.
math (n.2) Look up math at Dictionary.com
"a mowing," Old English mæð "mowing, cutting of grass," from Proto-Germanic *mediz (cognates: Old Frisian meth, Old High German mad, German Mahd "mowing, hay crop"), from PIE *me- (4) "to cut grass" (see mow (v.)).