This study aimed to analyze and describe the seventh-grade junior high school students’ mathematical understanding ability on comparison material using Microsoft Teams application during the covid-19 pandemic. This study employed a qualitative descriptive. The sampling technique used was the purposive random sampling technique. Subjects of this research were 35 students of class VII F SMP Negeri 1 Cilegon. The results show that student’s mathematical understanding using Microsoft Teams application during the covid-19 pandemic ability is 68% at high level category and 32% at low level category. Microsoft Teams is highly recommended for online learning in time of this pandemic.
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