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khabanhkingclub202
2 năm trước
Trong trường A có 155 cuốn sách toán và văn.Dự tính trong thời gian tới nhà trường mua thêm 45 cuốn sách văn và toán,trong đó số sách môn văn bằng 1/3 số sách môn văn hiện có và sách môn toán bằng 1/4 số sách môn toán hiện có.Tính số sách môn văn và toán có trong thư viện của nhà trường??
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