爸爸要做一个长方体模型,遇到了一个问题,让我帮忙算一算:一个长方体,如果高增加3厘米,就成为一个正方体,这时表面积比原来增加96平方厘米。原来长方体的长、宽、高各是多少厘米?怎样才能解决问题呢?首先要弄清楚表面积比原来增加了96平方厘米,是增加的哪些面的面积。我想了半天,忽然想到了画图,对啊,观察图就可以非常清楚地理解题意。画 Daddy to do a rectangular model, encountered a problem, let me help count: a rectangular body, if the increase of 3 cm, to become a cube, then the surface area increased by 96 square centimeters than the original. The original cuboid length, width, height, how many centimeters? How can we solve the problem? First of all, we must make clear that the surface area increased by 96 square centimeters than the original, which is the increase of the surface area. I thought for a long time, suddenly thought of drawing, yes, the observation chart can be very clear understanding of the problem. painting