arithmetic
arith•met•icBrE /əˈrɪθmətɪk/
NAmE /əˈrɪθmətɪk/
noun
word origin[uncountable] 1 the type of mathematics that deals with the adding, multiplying, etc. of numbers
example bank
He's not very good at arithmetic. 2 sums involving the adding, multiplying, etc. of numbersa quick bit of mental arithmetic (= sums you do in your head, without writing anything down)I think there's something wrong with your arithmetic.
