<![CDATA[This study aimed to describe the traditional counting practices of the Lani people in Lanny Jaya Regency and to identify the mathematical concepts embedded within those practices. The study employed a qualitative approach with an ethnographic design. Data were collected through observation, in-depth interviews, and documentation involving traditional leaders, community leaders, farmers, livestock breeders, and community members knowledgeable about traditional counting practices. Data analysis was conducted through data reduction, data display, and conclusion drawing, while data validity was ensured through source and technique triangulation. The findings revealed that the Lani people still utilize traditional counting practices in various daily activities, including livestock counting, crop distribution, customary payments, stone-burning ceremonies, and other social activities. The traditional number system consists of Ambir (one), Mbere (two), Kenagan (three), Mbereo (four), Abenok Linggi’togon (five), and subsequent numbers formed through combinations and additions of basic numbers. These counting practices reflect mathematical concepts such as numbers, one-to-one correspondence, addition, subtraction, grouping, comparison, and estimation. From an ethnomathematical perspective, these traditional counting practices represent mathematical activities embedded in cultural traditions and transmitted across generations.]]>
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