SUGIATNO, Sugiatno. Konsepsi Siswa Mengenai Operasi Hitung Bilangan Bulat Di Kelas V Sekolah Dasar. JURNAL PENDIDIKAN DASAR, [S. l.], v. 1, n. 1, p. 45–77, 2013. DOI: 10.46368/jpd.v1i1.61. Disponível em: https://jurnalstkipmelawi.ac.id/index.php/JPD/article/view/61. Acesso em: 30 jul. 2025.