Elementary Arithmetic involves the study of quantity, and the result of the operations of addition, subtraction, multiplication and division operations.
* http://www.cheat-sheets.org/saved-copy/MATH.CHEAT.SHEET---too.cool.and.imp--MUST.pdf * Ethopian Multiplication: http://threesixty360.wordpress.com/2009/06/09/ethiopian-multiplication/ * http://www.magicalmaths.org/how-japanese-kids-learn-to-multiply/ * http://en.wikipedia.org/wiki/Mathematics