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Abstract

The research was conducted in SDN Sumberejo 03 Malang wich has purpose to understanding concept fraction the IV grade students'. That was because in SDN Sumberejo 03, the understanding concepts mathematis were low, that was because the teacher still use conventional methods to teach their students. This research was classroom action research. Date analysis technique used was descriptive qualitative analysis, with the subject 21 students. This research used some data collection methods such as observation, documentation and test. This research was done on two cycles. There were 3 sessions (meetings) on the first cycle, and the second cycle there were 2 sessions. The result of this research shows that there was an improvement of the understanding concepts mathematis the IV grade students' SDN Sumberejo 03. This is can shown the learning outcoming on the cycle 1 was avarage 82,9, and the improvement on the cycle 2 was avarage 88,4. On completenes class the cycle 1 the students' achievement percentage was 76,2%, on the cycle 2 was 90,5%,

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