FERNANDES, J. A. Operating with positive numbers in GeoGebra: didactic implications. Revista do Instituto GeoGebra Internacional de São Paulo, [S. l.], v. 11, n. 2, p. 072–91, 2022. DOI: 10.23925/2237-9657.2022.v11i2p072-091. Disponível em: https://revistas.pucsp.br/index.php/IGISP/article/view/58089. Acesso em: 18 sep. 2024.