Studi Etnomatematika: Penentuan Tanggal Masyarakat Baduy dan Hubungannya dengan Konsep Aljabar

Abstract 
 Mathematics is a subject that notoriously difficult at school, but most people are not aware in their daily activities they have applied mathematics. Baduy apply calendar system used to calculate auspicious days, marry off children, travel, or build house. This study aims reveal the mathematical concepts life of can be as learning materials for To this, researchers Ethnomathematical Studies. In this study, approach type literature was used. Sources data obtained from books, literature, notes, and various reports. Data collection techniques using study. The results indicate there algebra concept community both related each other.