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hathuchuy
1 năm trước
Giải giúp mik nhe Để lát sàn một căn nhà , ngta đã dùng hết 500 viên gạch men hình vuông có cạnh 40. Hỏi căn nhà có diện tích là bao nhiêu m vuông?(biết diện tích phần mạch vữa không đáng kể )
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