ANALYSIS OF STUDENTS’ MATHEMATICAL PROBLEM SOLVING ABILITIES BASED ON POLYA’S STAGES IN MATHEMATICS LEARNING IN GRADE IV AT SD 25 BANDA ACEH. PJP [Internet]. 30 April 2026 [dikutip 21 Juli 2026];15(1):198-211. Tersedia pada: https://jurnal35.ar-raniry.ac.id/index.php/Pionir/article/view/34475