Rosmawati E. MENINGKATKAN KEMAMPUAN OPERASI PENJUMLAHAN BILANGAN PECAHAN MELALUI METODE DEMONSTRASI. JPD [Internet]. 2021 May 7 [cited 2026 May 20];11(02):291-302. Available from: https://journal.unj.ac.id/unj/index.php/jpd/article/view/20728