KUBANÇ, Y. EXAMINATION OF PRE-SERVICE CLASSROOM TEACHERS’ KNOWLEDGE ON THE FOUR OPERATIONS. International Online Journal of Education and Teaching, [S. l.], v. 10, n. 1, p. 554–573, 2022. Disponível em: https://iojet.org/index.php/IOJET/article/view/1807. Acesso em: 12 jan. 2026.