arithmetic - definition and synonyms

noun [uncountable] 

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  1. 1
    the part of mathematics that involves basic calculations such as adding or multiplying numbers

    He’s very good at arithmetic.

  2. 2
    the process of doing a calculation

    I’m not sure my arithmetic is correct, but I think the total is 75.

  3. 3
    the number of people or things that are involved in a situation, and the way in which they affect the situation

    According to the arithmetic, there could be six new cases each day.