Din limba greaca provine termenul, αριθμός inseamna "numar":
Arithmetic or arithmetics (from the Greek word αριθμός = number) is the oldest and most elementary branch of mathematics, used by almost everyone, for tasks ranging from simple day-to-day counting to advanced science and business calculations. In common usage, the word refers to a branch of (or the forerunner of) mathematics which records elementary properties of certain operations on numbers.
Sursa: wiki;) http://en.wikipedia.org/wiki/Arithmetic