<![CDATA[One of the most important sciences for humans is mathematics. Mathematics has been taught to students from elementary level or Primary School to high level or College. Its existence is essential to humanity because all human behavior is independent of mathematics. One of the learning materials in mathematics lessons for the elementary level is the operation of addition and subtraction in length. This material is now an important component of mathematics subjects in school. But in fact, it turns out that the level of mastery of this material among students is still very low. In addition, mathematics is still a scourge in itself because many students consider it a difficult subject for many reasons. Therefore, the purpose of this study is to analyze the problem of difficulties in learning mathematics that occur in students in material of long stacked addition and subtraction operations. This research method uses qualitative research that takes a case study approach. The subject of this study was a student who was in grade II elementary school with the initials AS. The data collection procedure includes (1) interviews, (2) observations, (3) tests, and (4) documentation. In this study showed that subjects had difficulty learning in long addition and subtraction operations. Such difficulties include difficulty understanding concepts of matter, as well as a lack of memory and interest in learning mathematics that cause the subject confusion when working on mathematical issues related to the matter.]]>
