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Oanh2018
2 năm trước
Một mảnh vườn hình chữ nhật có chu vi là 120 m , có chiều rộng là 3/5 chiều dài . a) tính diện tích mãnh vườn đó . b) người ta chia mãnh vườn đó thành hai khu . biết 1/2 diện tích khu trồng cây ăn quả = 2/5 diện tích khu trồng hoa. tính diện tích mổi khu
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