PELATIHAN BERHITUNG CEPAT DENGAN METODE JARIMATIKA DI MTSN 1 PROBOLINGGO. IEC: Journal of Educational Innovation, [S. l.], v. 1, n. 1, p. 55–60, 2025. Disponível em: https://research.iecjournal.com/index.php/IEC-JEI/article/view/7.. Acesso em: 16 apr. 2026.