Errors in solving math problems based on newman type

Abstract

The research aims to identify the types of mistakes students make in solving math problems in straight-line equation materials based on Newman type. The study subjects were 34 students of Grade VIII G SMP Negeri 2 Baturraden. Data retrieval techniques using tests. The data is analyzed with the Newman stage. The results showed 1) the highest percentage of errors on question number two was 93.08%; 2) the highest percentage of student errors at the encoding stage of 69.16%; and the lowest at the Transformation stage of 53.36%; 3) some of the mistakes made include: errors in understanding the problem, inaccuracies placing symbols in the problem-solving process, do not write down the complete information on the question; do not use formulas correctly, do not use proper calculation procedures, and did not write the final result correctly because students were still mistaken in doing calculations.