Penelitian ini bertujuan untuk mengetahui jenis kesalahan yang dilakukan siswa dalam menyelesaikan soal-soal materi tekanan pada zat menurut Polya di kelas VIII. Penelitian berjenis kualitatif menggunakan metode deskriptif. Penelitian dilaksanakan di SMPN 1 Guluk-Guluk dengan subyek penelitian siswa kelas VIII dengan jumlah 16 siswa. Berdasarkan hasil penelitian dapat disimpulkan bahwa persentase kesalahan yang dilakukan siswa berdasarkan Polya adalah : (1) Persentase kesalahan memahami masalah sebesar 19% (2) Persentase kesalahan merencanakan penyelesaian sebesar 21% (3) Persentase kesalahan menyelesaikan masalah sebesar 27% (4) Persentase kesalahan mengecek ulang hasil perhitungan sebesar 33%. Kata Kunci: jenis kesalahan siswa, polya, persentase kesalahan

This research to determine the types of student errors in solving the problem of material pressure on substances according to Polya in class VIII. The research method is qualitative descriptive. The subjects in this study were 16 students. The results showed the percentage of errors made by students based on Polya were: (1) The percentage of errors in understanding the problem is 19% (2) The percentage of planning errors is 21% (3) The percentage of problem solving errors is 27% (4) The percentage of error checking the calculation result is 33%. Keyword: type of students error, polya, the percentage of errors.

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