ALBAYRAK, Mustafa; ÖZDEMIR, Ercan. The Use of Addition/Subtraction Operation: Problem Equation Relationship Sample. Psycho-Educational Research Reviews, [S. l.], v. 2, n. 1, p. 23–33, 2013. Disponível em: https://www.perrjournal.com/index.php/perrjournal/article/view/384. Acesso em: 4 may. 2025.