The equal sign is one of the first mathematical symbols that the student knows, in which, without prior explanation, it only appears in basic operations, specifically, addition, subtraction and multiplication. Therefore, its use and understanding is developed empirically through examples where it is observed that “construimos y reconstruimos los significados de manera idiosincrásicas cada vez que aprendemos o manejamos ideas” (Arcavi, 2006, p. 29). In this sense, the conceptions of the equal sign in different...