A psicopedagógico look at teaching multiplication of operations and division of natural numbers proposed 1st to 3 year in textbooks of early years of basic education. Research, Society and Development, [S. l.], v. 8, n. 2, p. e982564, 2019. DOI: 10.33448/rsd-v8i2.564. Disponível em: https://rsdjournal.org/rsd/article/view/564. Acesso em: 5 dec. 2025.