An Analysis of Mathematical Communication Ability on Solving Open Ended Problems in Linier Equation System with Two Variables

Mathematical communication ability are the ability of students to convey mathematical ideas either orally, in writing or in motion, so that mathematical communication ability must be possessed by students. This research is a qualitative descriptive study that aims to describe the mathematical communication ability of junior high school students in solving open ended problems, namely where one problem has many solutions or many ways of solving. The subjects in this study were 28 students of class IX of SMP Negeri 1 Mojolaban and the instruments used were 3 test descriptions of mathematical communication ability test. The variable of this study is an indicator of mathematical communication ability. The results show that students’ mathematical communication ability are quite well categorized, with the following details: student achievement in expressing real objects, situations and daily events in the form of mathematical models as much as 91.6%, student achievement in explaining mathematical ideas and models into ordinary language as much as 69.6% and student achievement in explaining and making mathematics questions learned as much as 40.47%. From the three indicators, it appears that students are still lacking in terms of explaining and making mathematical questions learned.