Hội thảo khoa học các chuyên đề Olympic Toán học cấp THPT
PTO-Ngày 9-4, Hội Toán học Hà Nội và Vụ Giáo dục Trung học (Bộ Giáo dục và Đào tạo) phối hợp với Sở Giáo dục và đào tạo tổ chức hội thảo khoa học các chuyên đề Olympic Toán học cấp THPT.
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