Arithmetic Definition

ə-rĭthmĭ-tĭk
arithmetical
noun
The mathematics of integers, rational numbers, real numbers, or complex numbers under addition, subtraction, multiplication, and division.
American Heritage
The science or art of computing by positive real numbers, specif. by adding, subtracting, multiplying, and dividing.
Webster's New World
Knowledge of or skill in this science.
Her arithmetic is poor.
Webster's New World

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

Wiktionary
adjective
Of or relating to arithmetic.
American Heritage
Of, based on, or using arithmetic.
Webster's New World
Changing according to an arithmetic progression.
The increase in the food supply is arithmetic.
American Heritage

(mathematics) Of, relating to, or using arithmetic; arithmetical.

Arithmetic geometry.
Wiktionary

(arithmetic) Of a progression, mean, etc, computed solely using addition.

Arithmetic progression.
Wiktionary
Synonyms:

Other Word Forms of Arithmetic

Noun

Singular:
arithmetic
Plural:
arithmetics

Origin of Arithmetic

  • Middle English arsmetike from Old French arismetique from Medieval Latin arismetica alteration of Latin arithmētica from Greek arithmētikē (tekhnē) (art) of counting feminine of arithmētikos from arithmein to count from arithmos number ar- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English arsmetike, from Old French arismetique, from Latin arithmetica, from Ancient Greek ἀριθμητική (arithmētikē, “counting”) (τέχνη (tekhnē, “art”)), from ἀριθμός (arithmos, “number”). Used in English since 13th Century.

    From Wiktionary

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