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huyentrang0061
2 năm trước
1) Một cái sân hình chữ nhật có chiều rộng là 5,5m. Chiều dài gấp đôi chiều rộng. Tính diện tích cái sân đó. 2) Một lớp 5 trường tiểu học Ngô Quyền có 21hs nữ và số hs nữ đó chiếm 60% số hs trong lớp. Tính số hs của lớp học đó.
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