<![CDATA[This study aims to improve students' mathematical reasoning abilities at SMP Negeri 1 Percut Sei Tuan with a problem-based learning model. This type of research is class action research. The research was conducted in Class VII-1 of SMP Negeri 1 Percut Sei Tuan with a total of 32 students. This study uses data reduction and exposure. Based on the results of the study, it can be concluded that the application of a problem-based learning model using LKPD can improve students' mathematical reasoning abilities in SMP Negeri 1 Percut Sei Tuan. This is based on the achievement of predetermined success indicators, where the average percentage of classical mastery of students' mathematical reasoning abilities has reached 85%, the results in cycle II are 90.6%, and student absorption is 68. Furthermore, the learning process by applying the approach of problem-based learning using LKPD is at least in the "good" category, where the score is > 2.5. In the results of this study, the average learning process in the second cycle was at a value of 3.52, which is in the "good" category.]]>
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