BÜTÜNER, Suphi Önder. A Comparison of Turkish and Singaporean Textbooks in Relation to the Instructional Content on Mental Computation in Arithmetic Operations. Turkish Journal of Mathematics Education, [S. l.], v. 1, n. 1, p. 79–112, 2020. Disponível em: https://tujme.org/index.php/tujme/article/view/14. Acesso em: 10 mar. 2025.