This study aims to analyze the level of mathematical communication ability of junior high school students in online learning. The research method used is descriptive quantitative using a mathematical communication ability test instrument. Indicators of mathematical communication ability that must be achieved are 1) Converting real objects, pictures, and diagrams into mathematical ideas; 2) Expressing mathematical ideas through oral, written, and visually described; 3) Analyzing and evaluating mathematical ideas both orally and in writing; 4) Modeling mathematical situations or problems using language terms or mathematical symbols, and their structures; 5) Explaining answers to problems systematically. The subjects of this study were seventh-grade students of SMP N 1 Seputih Raman. The result of this research is the level of students' mathematical communication skills in online learning is in a low category. Students with a high level of mathematical communication ability (3.64%) are able to meet the five indicators of mathematical communication skills. Students with a moderate level of mathematical communication ability (15.94%) were not able to fulfill the first and second indicators. Students with low mathematical communication ability (80.43%) cannot fulfill the five indicators.
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