Etnomatematika: Analisis Konsep Modulo dalam Budaya Menghitung Wirid dengan Jari
Keywords:
etnomatematika, wirid, jari, aritmetika moduloAbstract
Penelitian ini bertujuan untuk mengeksplorasi keterkaitan antara konsep kongruensi dan aritmetika modulo dengan tradisi budaya menghitung wirid menggunakan jari yang masih dilestarikan masyarakat muslim. Metode penelitian yang digunakan adalah deskriptif kualitatif melalui wawancara mendalam dengan tiga tokoh agama di Pasuruan dan Probolinggo. Hasil penelitian menunjukkan adanya tiga pola utama dalam praktik menghitung wirid dengan jari, yaitu: (1) setiap jari dihitung sebagai satu bilangan, (2) ruas jari digunakan sebagai satuan hitungan, dan (3) kombinasi ruas dan ujung jari untuk mencapai jumlah 33. Analisis matematis memperlihatkan bahwa praktik tersebut dapat dimodelkan dengan konsep kongruensi dan aritmetika modulo, misalnya 100 ? 1 (mod 33). Temuan ini mengungkap bahwa budaya menghitung wirid menggunakan jari tidak hanya sarat dengan nilai spiritual, tetapi juga menyimpan praktik matematis yang relevan sebagai sumber kontekstual dalam pembelajaran matematika.
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