Level of reasoning ability for eight grades student of State Junior High School

  • Novalinda Puspita Ayu Universitas Negeri Yogyakarta, Yogyakarta, Indonesia
  • Heri Retnawati Universitas Negeri Yogyakarta, Yogyakarta, Indonesia


This study aims to describe the level of reasoning ability for eight students of grade VIII SMP in Baubau city. This research is a descriptive explorative research with mixed method approach. Collecting data from mathematical reasoning test results consisted of 4 items given to 300 students represented by six schools with high, medium, and low category, as well as 16 students representing each school as respondents in the interview. Data were analyzed by calculating the average score of reasoning ability in each school, case study of student test result, and interview. The results are: 1) the average score of students' mathematical reasoning ability is in the middle category with the average reasoning ability score of 31.00, and 2) the analysis results of students' answering and interviews show that some students are still have difficulty in solving problems related to the ability of mathematical reasoning