Novaliyosi N, Tola B, Rahayu W. TRENDS OF MATHEMATICAL LOGICAL THINKING ABILITYTHROUGH THE CRA (CONCRETE-REPRESENTATIONAL-ABSTRACT) APPROACHWITH PORTFOLIO ASSESSMENT. IJER [Internet]. 2020Jan.30 [cited 2025Apr.21];6(2). Available from: http://103.8.12.212:33180/unj/index.php/ijer/article/view/14077