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Definition of: arithmetic
(ə·rith′mə·tik) noun
1. The science of numbers and of computing with numbers under the four operations of addition, subtraction, multiplication, and division.
2. A treatise upon this science.
—ar·ith·met·ic (ar′ith·met′ik) adjective Of or pertaining to arithmetic: also ar′ith·met′i·cal. [<L arithmetica <Gk. (hē) arithmetikē (technē) (the) counting (art) <arithmeein count, number <arithmos number]
—ar′ith · met′i·cal·ly adverb
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