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Mathematics, 24.07.2021 01:40 haileysmile2006
Số học sinh bốn khối 6,7,8,9 tỉ lệ với các số 9;8;7;6. Biết rằng số học sinh khối 9 ít hơn số học sinh khối 7 là 70 học sinh . Tính số học sinh của mỗi khối
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Số học sinh bốn khối 6,7,8,9 tỉ lệ với các số 9;8;7;6. Biết rằng số học sinh khối 9 ít hơn số học si...
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