Comparison the Fee of Cell Phone Companies: Collaborative Study between a Mathematics Teacher-Trainee and High School Students. International Journal of Education in Mathematics, Science and Technology, [S. l.], v. 8, n. 1, p. 16–33, 2020. DOI: 10.46328/ijemst.v8i1.787. Disponível em: https://ijemst.com/index.php/ijemst/article/view/445. Acesso em: 29 jun. 2025.