<![CDATA[This study aims to determine the difficulties of junior high school students in solving problems of operating algebraic forms. This research is included in the type of descriptive research with a qualitative approach, with the research design used is a case study. The subjects of this study were 20 students of class VII SMP Negeri 5 Sendana and 4 students were selected using a purposive sampling technique. The results of the analysis show that students' difficulties in solving algebraic operational problems consist of 4 (four) difficulty criteria, namely; 1) Able to solve problems properly and correctly; 2) Be able to understand the problem and be able to identify information on the problem, be able to plan a solution to the problem but make a mistake in implementing the problem-solving plan and re-examine the answers that have been written; 3) Difficulty understanding the problem, difficulty planning problem solving, difficulty implementing problem solving plans and difficulty re-checking answers; 4) Able to understand the problem and identify the information contained in the problem, experience difficulties in problem-solving plans, difficulties in implementing problem-solving plans and re-checking answers. In conclusion, this study resulted in an analysis of the difficulties of class VII students in solving mathematical problems material for algebraic operations in three ability categories, namely; 1) Subjects with high ability category (ST); 2) Subjects with medium ability category (SS) and 3) Subjects with low ability category (SR) Keywords: Difficulty analysis, Problem solving, Operations of Algebraic Forms]]>
