a branch of mathematics that deals with real numbers and calculations made with them
calculation using numbers
a person's skill with numbers
My arithmetic is improving
arithmetic /arithʹmetik/ adj
arithmetical /-ʹmetikl/ adj
arithmetically /-ʹmetikli/ adv
arithmetician /-məʹtish(ə)n/ noun
[Middle English arsmetrik via Old French and Latin from Greek arithmētikē, ultimately from arithmos number]