<![CDATA[This study aims to explore the potential use of student worksheets (LKM) based on Cross Math with the Realistic Mathematics Education (RME) approach to improve students’ understanding of number operations through set theory. The research employed a preliminary study with a mixed-method approach. Data were collected through questionnaires distributed to 75 mathematics education students at Universitas Muhammadiyah Bangka Belitung who had taken Basic Mathematics courses, as well as interviews with course lecturers. The questionnaire results revealed that the majority of students considered arithmetic operations as an essential topic to master, with a tendency to better understand concepts when linked to real-life experiences. Most students also perceived that learning media, particularly worksheets, are highly supportive in the learning process. Lecturer interviews further indicated that students often face difficulties in understanding algebra, sets, and geometry, which highlights the need for innovative, interactive, and contextual learning media. Based on these findings, Cross Math-based worksheets with the RME approach have the potential to become an alternative learning medium that can increase motivation, strengthen conceptual understanding, and provide a more meaningful learning experience. This study serves as a preliminary foundation for subsequent development stages, namely the production of Cross Math-based worksheets that are valid, practical, and effective for use in mathematics learning at the higher education level.]]>
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