HS tham gia vòng Toán tuổi thơ cấp trường NH 2020 – 2021

20210225_075913 20210225_135603 20210225_142236 20210225_153829 (1) 20210225_075809 (1)20210225_135603

20210407_140111 20210407_140018 20210407_140057 20210407_140029 20210407_140036