Mathematics Teacher (1922) Vol. 15, No. 3
THE MATHEMATICS T EACHER Yor.UME XY B~ l'tofessot• 1-:ll\\' .\ H ll I,. TIIIJR::-\DlKE ltl!llilull' or l:du('alional He!'t>nrch Tca<"IWn! l'ollt'~t. ('olumhia Univprsity The equation ha:-. two di~l'crcllt uses. Pirst, it is an organizattio of data in snch a way as to indicate the operations r l'quiire to obi a i 11 a l
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