Valdemoros Alvarez, Marta Elena. “DIFFICULTIES EXPERIENCED BY THE PRIMARY TEACHER IN INSTRUCTION OF FRACTIONS”. Revista Latinoamericana de Investigación en Matemática Educativa 13, no. 4(II) (April 12, 2010): 423–440. Accessed October 9, 2026. https://relime.org/index.php/relime/article/view/284.