arithmetic

From Wiktionary

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[change] Noun

Singular arithmetic

Plural none

1. (uncountable) The kind of mathematics in which addition, subtraction, multiplication, and division are done on numbers.

   My son is starting to do simple arithmetic like 2 + 2 = 4.

Basic math (edit)

arithmetic - algebra

addition - subtraction - multiplication - division

exponent - square root - fraction

least common multiple - greatest common factor