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minhquan27604
2 năm trước
Người ta xếp tất cả các hình lập phương cạnh 1cm thành một hình lập phương lớn có diện tích toàn phần là 96cm2. Sau đó người ta sơn tất cả các mặt của khối lớn đó. Hỏi có bao nhiêu hình lập phương nhỏ chỉ được sơn 3 mặt, 2 mặt, 1 mặt, và không mặt nào ?
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