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Number & MeasureGreekEnglish

Arithmetic

/əˈrɪθmətɪk/noun

Calculation with numbers: adding, subtracting, multiplying and dividing.

The Greek roots

ἀριθμός
arithmós
number, counting

Literally: the counting art

The story of the word

Greek ἀριθμητικὴ τέχνη is the art of number, and it was understood as the theory of numbers themselves, while the grubbier business of reckoning with them for trade was λογιστική. Middle English scribes wrote arsmetrike, having decided the word must be Latin ars metrica, the measuring art, and the Greek spelling was only restored by Renaissance scholars. Algorithm, which sounds like a cousin, is not one: it comes from the name of the ninth-century mathematician al-Khwarizmi and was pulled towards this spelling by association.

How it travelled
Ancient Greek → Latin → Old French → English
First recorded
13th century

Same family

logarithmarithmeticalarithmetician

In a sentence

The arithmetic of the deal never worked, whatever the slides said.

Built on the same root

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