The ability to solve mathematical word problems is an essential skill that primary school students must possess, as it involves understanding the problem, planning a solution, carrying out calculations, and drawing conclusions. However, in practice, many students still make errors in solving mathematical word problems. This study aims to analyze the types of errors made by fifth-grade elementary school students in solving mathematical word problems and to identify the factors causing these errors. This research uses a qualitative approach with a descriptive method. The research subjects were fifth-grade elementary school students. Data were collected through tests, interviews, and documentation. Data analysis was conducted using the Newman Error Analysis stages, which include reading errors, comprehension errors, transformation errors, process skill errors, and encoding errors. The results show that students made errors at all stages of problem solving, with the most dominant error occurring at the comprehension stage. The factors causing these errors include a lack of conceptual understanding, difficulty in interpreting problem language, and lack of accuracy in calculations. The findings of this study are expected to serve as an evaluation for improving mathematics instruction in elementary schools.
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