The results of the research showed an increasing in mathematics reasoning andĬommunication. Research is descriptive qualitative by using groove method that is analyzed from action learning implemented and developed during the learning process. Technique of collecting data are observation, record field, documentation and test methods. The subject of this research the researcher as a teacher that provides classroom actions research and the actions receiver are the students ofĬlass VII B who are amount 31 students. Type of research is a classroomĪction research. This research has purpose to improve students' reasoning and mathematics communication of VIII B grade, SMP Negeri 2 Colomadu in problem solving by using Think-Talk-Write Strategy on the circle.
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