【问题】有4个棱长为50厘米的正方体纸箱放在墙角处,露在外面的面有几个?露在外面的面积是多少?【思路点睛】将几个正方体木块或者纸箱之类的物体放在墙角,计算它露在外面的面的面积时,主要是观察它露在外面的有几个面。观察时有两种方法。方法一:看每个纸箱露在外面的面有几个,再计算全部纸箱露在外面的面。 [Question] There are four prism length of 50 cm square box on the corner, exposed on the surface of several? Exposed area is what? [Ideas dot eye] will be a few square pieces of wood or cardboard boxes and the like Of the object on the corner, calculate the area of ​​the surface exposed to it, the main is to observe it exposed on the outside of several surfaces. There are two ways to observe. Method one: see each carton exposed on the outside of a few, and then calculate all the exposed outside of the carton surface.