Augusti, Marilene Pessoa da Silva, Margareth Araújo e Silva, and Luciana Cristina Porfirio. 2026. “AN ANALYSIS OF THE IMPORTANCE OF MENTAL CALCULATION IN THE 5TH GRADE OF ELEMENTARY SCHOOL AT THE PEDRO LUDOVICO TEIXEIRA MUNICIPAL SCHOOL IN THE MUNICIPALITY OF COLINAS DO TOCANTINS”. Seven Editora, March, 3584-97. https://doi.org/10.56238/sevened2026.008-197.