Chotwinyu N, Kongthip Y, Chaladgarn T. A STUDY OF MATHEMATICAL PROBLEM-SOLVING ABILITY IN LINEAR EQUATIONS IN ONE VARIABLE OF GRADE 7 STUDENTS USING CONCRETE-PICTORIAL-ABSTRACT: CPA APPROACH. J. IND. EDUC. [Internet]. 2022 Jul. 11 [cited 2024 Apr. 25];21(1):33-4. Available from: https://ph01.tci-thaijo.org/index.php/JIE/article/view/246862