ANALISIS KESULITAN BELAJAR SISWA PADA MATERI PENJUMLAHAN MATEMATIKA DI SEKOLAH DASAR KELAS 3 SD MENGGUNAKAN MODEL PEMBELAJARAN CTL (CONTEXTUAL TEACHING AND LEARNING). JPPD [Internet]. 2026 Oct. 27 [cited 2026 Oct. 28];3(02):131-4. Available from: https://journal.lumiverapublishing.org/index.php/jppd/article/view/139