Rifai R, Turmudi, Jarnawi Afgani Dahlan, Suhendra. The effect of open-ended approach on enhancing mathematical understanding in vocational high school students. KJPM [Internet]. 2025Nov.18 [cited 2025Nov.21];10(2):58-2. Available from: https://www.kalamatika.matematika-uhamka.com/index.php/kmk/article/view/711