Mathematics, 04.11.2021 01:00 nataliamontirl4230

Hưởng ứng phong trào quyên góp sách giáo khoa cũ giúp đỡ học sinh có hoàn cảnh khó khăn, ba lớp 7A, 7B, 7C đã quyên góp số sách lần lượt tỉ lệ với 7 ; 8 ; 9. Tính số sách giáo khoa mỗi lớp quyên góp, biết tổng số sách của 3 lớp quyên góp được là 288 quyển.

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Hưởng ứng phong trào quyên góp sách giáo khoa cũ giúp đỡ học sinh có hoàn cảnh khó khăn, ba lớp 7A,...

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