BAUYON, Ma. Christina. Project MBO (Mastery of Basic Operations) In Improving the Numeracy Level of the K-3 Elementary Learners. JPAIR Multidisciplinary Research, Philippines, v. 54, n. 1, p. 42–51, 2023. DOI: 10.7719/jpair.v54i1.861. Disponível em: https://philair.ph/index.php/jpair/article/view/861. Acesso em: 2 apr. 2025.