The use of subtraction algorithm’s in primary education. Edma 0-6: Educación Matemática en la Infancia, [S. l.], v. 4, n. 2, p. 73–88, 2021. DOI: 10.24197/edmain.2.2015.73-88. Disponível em: https://revistas.uva.es/index.php/edmain/article/view/5855. Acesso em: 10 jan. 2026.