Manipulative Materials for Discovering and Decomposing Numbers: Flashcards to Develop Number Sense. Educación y Futuro: Revista de Investigación Aplicada y Experiencias Educativas, [S. l.], n. 40, p. 197–221, 2019. Disponível em: https://educacionyfuturo.com/educacionyfuturo/article/view/8033. Acesso em: 21 may. 2026.