Exploration of school mathematics material in the ethnomathematics of Sasambo culture

The sasambo culture of West Nusa Tenggara is one of many Indonesian cultures that can be used as a source for learning mathematics. Math concepts from primary school can be blended with sasambo cultural elements. The integration is a useful technique for helping children comprehend mathematics more easily and meaningfully. The goal of this study is to explore school mathematics material in the ethnomathematics of Sasambo Culture. The research design employed in this study is an ethnographic research design, which includes qualitative research. The 18 participants in this study were divided over Central Lombok, East Lombok, Sumbawa Besar, West Sumbawa, and Bima are in West Nusa Tenggara. They included weavers, traditional elders, farmers, and special food makers. The research instruments included observation guides and interview guides. Data collection techniques were carried out through participant observation and in-depth interviews. The research procedure or research steps in conducting ethnographic research are as follows: 11) selecting an ethnographic project, 2) submitting ethnographic questions, 3) collecting ethnographic data, 4) making ethnographic notes, 5) confirming data, 6) analyzing ethnographic interviews, 7) grouping cultural themes, 8) writing ethnography, and 9) making research reports. The results of the research show that various mathematical knowledge in the SASAMBO culture include: (1) numbers and number bases; (2) geometric transformation; (3) the area and volume of the shape; (4) flat wake area; (5) congruence and congruence; (6) non-standard measurements and units; (7) multiplication and division arithmetic operations; (8) value comparison. The results of this study are important as material for the ethnomathematics data base in NTB, making it easier for other researchers to conduct further research and make it easier for teachers to create ethnomathematics-based learning tools.