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trandinhloc2k1
2 năm trước
Lớp 7A có số học sinh nam nhiều hơn số học sinh nữ là 26 bạn tỉ số giữa học sinh nam và học sinh nữ là 18/5.tính tổng số học sinh lớp 7A( áp dụng tính chất dãy tỉ số bằng nhau )
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