Martínez Melo NS, Rojas Garzón PJ, Rojas Rodríguez NL. THE Strategies of children in the resolution of multiplying situations: recognition and use of units. RELIME [Internet]. 2018 Jun. 26 [cited 2026 Oct. 9];21(2). Available from: https://relime.org/index.php/relime/article/view/13