Nguyen TK, Nguyen TS. Developing 3rd graders’ practical problem-solving competences through teaching of numerical and calculation contents. Tạp chí Khoa học Đại học Đồng Tháp [Internet]. 2025 Apr. 14 [cited 2026 Mar. 9];14(4):41-50. Available from: https://dthujs.vn/index.php/dthujs/article/view/1836