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Syamsul, Huda and Lusi, Anggraini and Rizka Dwi, Saputri and Muhamad, Syazali and Rofiqul, Umam (2019) LEARNING MODEL TO IMPROVE THE ABILITY TO UNDERSTAND MATHEMATICAL CONCEPTS. PRISMA, 8 (2). pp. 173-181. ISSN p-ISSN 2089 3604 ; e-ISSN 2614 4611