Yamti, Yamti, SMP Negeri 9 Yogyakarta, Jalan Ngeksigondo No.30, Yogyakarta, 55172 (Indonesia)
Yanuarto, Wanda Nugroho, Department of Mathematics Education, Universitas Muhammadiyah Purwokerto (Indonesia)
Yasna, Lella Tahlilla, MA Ali Maksum Krapyak Yogyakarta Jalan Kyai Haji Ali Maksum RT. 5, Dusun Krapyak Kulon, Desa Panggungharjo, Kec. Sewon, Bantul, Daerah Istimewa Yogyakarta (Indonesia)
Yulina, Rikka, Universitas Islam Negeri Raden Intan Lampung, Bandar Lampung (Indonesia)
Yulistiyarini, Harna, SMP Negeri 1 Dukuhseti Pati (Indonesia)
Yundari, Yundari, Department of Mathematics, Universitas Tanjungpura (Indonesia)
Yunianto, Rosid, SMP Satu Atap Werdi Kabupaten Pekalongan (Indonesia)
Yuntari, Yustina Hilda, Department of Mathematics Education, Universitas Negeri Yogyakarta, Indonesia (Indonesia)
Yusuf, Muhammad, Department of Mathematics, STKIP Taman Siswa Bima (Indonesia)
Yusup, Muhammad, Program Studi Pendidikan Matematika, Universitas Sriwijaya (Indonesia)

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