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hoangiangbui0704
2 năm trước
Bài 6:Một mảnh ruộng hình thoi có tổng độ dài hai đường chéo là 45m.Biết đường chéo thứ nhất bằng 2/3 đường chéo thứ hai. Tính số kg thóc thu hoạch được trên cả mảnh ruộng .Biết rằng 1m² ruộng thu hoạch được 3kg lúa
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