Division involving zero: an experimental study and its implications

Autor:	GROUWS, DOUGLAS A., REYS, ROBERT E.
Zdroj:	The Arithmetic Teacher, 1975 Jan 01. 22(1), 74-80.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/41191207 Zobrazit plný text záznamu