CARLOS ALBERTO PARAGUA MACURI , MELISSA GABRIELA PARAGUA MACURI , MELECIO PARAGUA MORALES , NICÉFORO BUSTAMANTE PAULINO. Basic operations with rational numbers and didactic mediation of the place value board in first grade students in Huánuco. Journal of International Crisis and Risk Communication Research , [S. l.], p. 372–382, 2024. DOI: 10.63278/jicrcr.vi.732. Disponível em: http://jicrcr.com/index.php/jicrcr/article/view/732. Acesso em: 7 dec. 2025.