PENGARUH PENERAPAN MODEL PROBLEM BASED LEARNING TERHADAP KEMAMPUAN MEMECAHKAN MASALAH SISWA PADA MAPEL MATEMATIKA KELAS IV DI SDN 2 JERUKAN JAWA TENGAH. IPSSJ [Internet]. 2026 May 19 [cited 2026 Oct. 22];3(05 Mei):2951-9. Available from: https://ipssj.com/index.php/ojs/article/view/1411