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2 năm trước
Một nền nhà hình chữ nhật có chiều dài 8m, chiều rộng 4m. Người ta lát nền nhà đó bằng các viên gạch hình vuông có cạnh 4dm. a. Hỏi cần mua bao nhiêu viên gạch để lát kín nền nhà đó? b. Biết rằng cứ 3m² loại gạch đó giá 690 000 đồng, hỏi cần bao nhiêu tiền mua gạch để lát nền nhà? (Diện tích mạch vũữa không đáng kê)
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