APREBO, F. C. Y.; SOBA, Uranta. Improvisation and Usefulness of a Scaling Board In Inverse Proportion Problem Solving. Journal of Research in Education and Society (JRES) , [S. l.], v. 10, n. 1, p. 45–52, 2019. Disponível em: http://icidr.org.ng/index.php/Jres/article/view/1484. Acesso em: 19 sep. 2024.