the method or process of computation with figures: the most elementary branch of mathematics.
Also called higher arithmetic, theoretical arithmetic. the theory of numbers; the study of the divisibility of whole numbers, the remainders after division, etc.
a book on this subject.
Also, arithmetical. of or relating to arithmetic.
Historical Examples

There is present, of course, an arithmetically unequal division of horizontal extent, aside from the filling.
Harvard Psychological Studies, Volume 1 Various

Consider, I beg of you, arithmetically, what this fact means.
Time and Tide by Weare and Tyne John Ruskin

His deduction was arithmetically, but not bibliographically, accurate.
The Confessions of a Collector William Carew Hazlitt

Surely that, arithmetically speaking, is the position in which ciphers are most powerful.
Punch, or the London Charivari, Vol. 152, April 25, 1917 Various

These designations are arithmetically inaccurate, but the Romans reckoned both ends of the series.
New Latin Grammar Charles E. Bennett

arithmetically this work belongs in the first or second years of learning.
The Psychology of Arithmetic Edward L. Thorndike

If the two persons were equal, their respective shares would be arithmetically equal: Achilles would have six, Ajax six.
What is Property? P. J. Proudhon

But the man cannot be the representative of a class, that is clear: it is physically and arithmetically impossible.
The Paris Sketch Book of Mr. M. A. Titmarsh: The Irish Sketch Book William Makepeace Thackeray

Put forward, my paradoxical Pupils, methodically and arithmetically, one by one.
The Works of John Marston John Marston

The increase of population is arithmetically measured, and it stands in relations of direct causation to every social change.
Appletons’ Popular Science Monthly, December 1899 Various

the branch of mathematics concerned with numerical calculations, such as addition, subtraction, multiplication, and division
one or more calculations involving numerical operations
knowledge of or skill in using arithmetic: his arithmetic is good
adjective (ˌærɪθˈmɛtɪk)
of, relating to, or using arithmetic

mid-13c., arsmetike, from Old French arsmetique (12c.), from Latin arithmetica, from Greek arithmetike (tekhne) “(the) counting (art),” fem. of arithmetikos “of or for reckoning, arithmetical,” from arithmos “number, counting, amount,” from PIE root *re(i)- “to reason, count” (cf. Old English, Old High German rim “number;” Old Irish rim “number,” dorimu “I count;” Latin ritus “religious custom;” see read).

Originally in English also arsmetrik, on folk etymology from Medieval Latin ars metrica; spelling corrected early 16c. Replaced native tælcræft, literally “tell-craft.”
The mathematics of integers, rational numbers, real numbers, or complex numbers under the operations of addition, subtraction, multiplication, and division.


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  • Arithmetician

    an expert in . Historical Examples The parties are to be to him merely A and B, and he has to work out the result as an arithmetician works out a sum. Social Rights and Duties, Volume I (of 2) Sir Leslie Stephen And that person is he who is good at calculation—the arithmetician? Lesser […]

  • Arithmetize

    verb to express in arithmetic form

  • Arithmocracy

    noun rule by the numerical majority of the population Word Origin Greek arithmos ‘number’ Historical Examples arithmocracy, ar-ith-mok′ras-i, n. a democracy of mere numbers. Chambers’s Twentieth Century Dictionary (part 1 of 4: A-D) Various n. “rule by numerical majority,” 1850, from Greek arithmos “number, counting, amount” (see arithmetic) + -cracy. Related: Arithmocratic; arithmocratical.

  • Arithmomania

    noun a passion for numbers, counting; compulsive counting Word Origin Greek arithmos ‘number’ n. “compulsive desire to count objects and make calculations,” 1890, from French arithmomanie, from Greek arithmos “number, counting, amount” (see arithmetic) + French -manie (see mania). Related: Arithmomaniac.

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