Flexible Mental Calculation: Reasoning Profiles of Brazilian Students in Second and Fourth Grades

Teixeira Nunes, S. C., Vargas Dorneles, B., & Corso, L. V. (2023). Flexible Mental Calculation: Reasoning Profiles of Brazilian Students in Second and Fourth Grades. Journal of Mathematics Education, 13(1), 35–55. https:/​/​doi.org/​10.26711/​007577152790053