<![CDATA[AbstractThis research aims to find out how the mathematical critical thinking ability of students in SMP Negeri 1 Kupang. The research used descriptive research with a qualitative approach. The subject of this study was 32 students of class VIII-B SMP Negeri 1 Kupang. The object of this research is the ability of critical thinking mathematical class VIII-B SMP Negeri 1 Kupang school year 2019/2020. The data collected in the form of test results are critical thinking skills of student mathematics, interviews and documentation. The data analysis techniques used to adopt and develop by Miles and Hiberman include: data reduction, data presentation, drawing conclusions, and data validity testing with data source triangulation. The results showed that most of the students critical thinking skills were low in mathematics. From the results of the incomplete percentage gained that 62.5% is far above the due percentage is 37.5% showed that most students the ability of critical thinking is low mathematics. If viewed from the results of students answers received percentages 21.87% the students who answer correctly about number 1. 31.25% students who answer correctly about number 2. And 46.87% the students who answer correctly about number 3. The results showed that the percentage calculation of students who were able to reach KBM 37.5% while students who did not reach KBM as much as 62.5%.Keywords: Analysis, The ability of critical thinking]]>
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