<![CDATA[This research was started from students’ low communication ability and mathematical problem solving at grade IX SMP Negeri Kecamatan Sungai Penuh. To solve the problems, thus the writer applied problem-based learning approach. By using problem solving activity the students was guided to understand the concept and to find the characteristics of the subject material, so that the students would be trained to propose their mathematical idea and to develop problem solving ability. The aim of this research was to know the effect of problem-based approach toward enhancement of communication ability and students’ mathematical problem solving at grade IX SMP Negeri Kecamatan Sungai Penuh. This research was conducted based on the quasi experimental research.. To get the sample, the writer used random sampling technique. T-Test and U-Test was used to analyze the data. Based on the result of the data analysis, the writer got some conclusions that was the enhancement of communication ability and students’ mathematical problem solving that using problem-based approach was better than using conventional teaching approach.]]>
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