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n.tientuan
2 năm trước
Một căn phòng hình chữ nhật có chiều dài 12m, chiều rộng 8m. Người ta lát nền nhà bằng những viên gạch men hình vuông có cạnh là 4dm a/Tìm số viên gạch cần để lát kín nền nhà. b/Giá tiền mua 1m² gạch men là 85000 đồng. Để lát gạch kín nền nhà đó người ta phải trả bao nhiêu tiền?
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