Abstract
Learning mathematics requires the ability to think logically and critically, not only learning to count. Therefore, teaching concepts is very important. Many students have incorrect, incomplete concepts and so on. As a result, mistakes occur when students do simple mathematics. This research was conducted with the aim of knowing the errors in the castor stage. The stages of castor are used including concept errors, procedure errors and technic errors.
 This research is a qualitative research. The research subjects were students of grade VI SDN Belitung Selatan 1 Banjarmasin. The procedure for selecting subjects used purposive sampling. The data techniques used were tests and interviews. The test is in the form of description questions. The data analysis technique used was data reduction, data presentation and data collection.
 Based on the research data, it can reveal that students made misconceptions, procedural errors and technical errors. Each student made these mistakes with different indicators.
Highlights
Learning mathematics requires the ability to think logically and critically, learning to count
This research was conducted with the aim of knowing the errors
The test is in the form of description questions
Summary
Penelitian kualitatif deskriptif yaitu mendeskripsikan analisis kesalahan siswa menggunakan teori Kastolan dalam menyelesaikan soal operasi hitung bilangan bulat. Subjek penelitian sebanyak 6 orang yang merupakan siswa kelas VI SDN Belitung Selatan 1 Banjarmasin tahun 2019/2020. Pemilihan subjek berdasarkan teknik sampling, yaitu mengambil salah satu siswa yang melakukan kesalahan konseptual, prosedural dan teknik ketika diberikan soal operasi hitung bilangan bulat. Peneliti menganalisis hasil pekerjaan sesuai dengan indikator analisis kesalahan Kastolan yag diadaptasi dari (Khanifah & Nusantara, 2011) dan (Widyantari, 2016)
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