Machnun Saputra A, Sugiarti R. Utilization of Android-Based ToSM (Test of Second Mathematics) Instrument for Mapping Intuitive Basic Calculation Competencies (IBCC) in Students. IERJ [Internet]. 2021 Jul. 31 [cited 2026 May 13];2(2):54-67. Available from: https://ittishal.net/web/index.php/ierj/article/view/21