A shortened form of arithmetic, especially an aphetic form used to stress and compare its initial "r" sound to that of the words "reading" and "writing".
"rithmetic." YourDictionary, n.d. Web. 22 June 2018. <http://www.yourdictionary.com/rithmetic>.
rithmetic. (n.d.). Retrieved June 22nd, 2018, from http://www.yourdictionary.com/rithmetic
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