Suharwati, Suharwati. 2018. “Application of Problem Solving Method and Utilization of Long Single Standard Tools to Increase Learning Math Result of Students IV SDN 03 Merigi Lesson Learning Time 2016/2017”. JURIDIKDAS: Jurnal Riset Pendidikan Dasar 1 (2). https://doi.org/10.33369/juridikdas.1.2.%p.