Medrano, Ana, and Rosa Del Carmen Flores-Macías. “Early Algebra As a Tool for Analysis and Understanding of Arithmetic Problems in Primary”. CULTURA EDUCACIÓN Y SOCIEDAD 9, no. 1 (July 1, 2018): 9–26. Accessed April 27, 2025. https://ojstest.certika.co/culturaeducacionysociedad/article/view/1808.