Nurhidayah, D., E. Ikmawati, and W. Wahyudi. “Watson’s Error Category: Analysis of Student Errors in Solving Algebraic Calculation Operation Problems”. Journal of Education and Learning Mathematics Research (JELMaR), Vol. 5, no. 2, Nov. 2024, pp. 206-1, doi:10.37303/jelmar.v5i2.3807.