arithmetic

/EH0 R IH0 TH M EH1 T IH0 K/
noun
  1. 1

    The mathematics of numbers (integers, rational numbers, real numbers, or complex numbers) under the operations of addition, subtraction, multiplication, and division.

adjective
  1. 1

    Of, relating to, or using arithmetic; arithmetical.

    arithmetic geometry

  2. 2

    Of a progression, mean, etc, computed solely using addition.

    arithmetic progression

Source: https://en.wiktionary.org/wiki/arithmetic