Definition of arithmetic
1a
: a branch of mathematics that deals usually with the nonnegative real numbers including sometimes the transfinite cardinals and with the application of the operations of addition, subtraction, multiplication, and division to them
b
: a treatise on arithmetic
2
: computation, calculation
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MerriamWebster unabridged
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Time Traveler for arithmetic
The first known use of arithmetic was in the 15th century
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