1.一个正方体铁块棱长8cm,在它每个面得中央焊接一个棱长5cm的正方体,所得物体的表面积是()cm²2.体积相等的3个正方体平成一个长方体,长方体的表面积比原来三个正方体的表面积的和减
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![1.一个正方体铁块棱长8cm,在它每个面得中央焊接一个棱长5cm的正方体,所得物体的表面积是()cm²2.体积相等的3个正方体平成一个长方体,长方体的表面积比原来三个正方体的表面积的和减](/uploads/image/z/1602736-16-6.jpg?t=1.%E4%B8%80%E4%B8%AA%E6%AD%A3%E6%96%B9%E4%BD%93%E9%93%81%E5%9D%97%E6%A3%B1%E9%95%BF8cm%2C%E5%9C%A8%E5%AE%83%E6%AF%8F%E4%B8%AA%E9%9D%A2%E5%BE%97%E4%B8%AD%E5%A4%AE%E7%84%8A%E6%8E%A5%E4%B8%80%E4%B8%AA%E6%A3%B1%E9%95%BF5cm%E7%9A%84%E6%AD%A3%E6%96%B9%E4%BD%93%2C%E6%89%80%E5%BE%97%E7%89%A9%E4%BD%93%E7%9A%84%E8%A1%A8%E9%9D%A2%E7%A7%AF%E6%98%AF%EF%BC%88%EF%BC%89cm%26%23178%3B2.%E4%BD%93%E7%A7%AF%E7%9B%B8%E7%AD%89%E7%9A%843%E4%B8%AA%E6%AD%A3%E6%96%B9%E4%BD%93%E5%B9%B3%E6%88%90%E4%B8%80%E4%B8%AA%E9%95%BF%E6%96%B9%E4%BD%93%2C%E9%95%BF%E6%96%B9%E4%BD%93%E7%9A%84%E8%A1%A8%E9%9D%A2%E7%A7%AF%E6%AF%94%E5%8E%9F%E6%9D%A5%E4%B8%89%E4%B8%AA%E6%AD%A3%E6%96%B9%E4%BD%93%E7%9A%84%E8%A1%A8%E9%9D%A2%E7%A7%AF%E7%9A%84%E5%92%8C%E5%87%8F)
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