论文部分内容阅读
在平时的解题中,同学们经常会遇到这样一类习题,把一个正方体的表面全部涂上颜色,然后切成棱长是1厘米的小正方体,问一面、两面、三面和没有涂色的小正方体各有多少个。对于此类问题,好多同学感到不知从何入手。其实,只要同学们细心观察、仔细分析,就会发现解答这类习题是有一定规律可寻的。下面就让我们通过对一个实例的分析来共同探讨这类习题的解答方法。
In the usual problem-solving, students often encounter such a class of exercises, all the surface of a square painted color, and then cut into a prism is 1 cm long cube, ask one, two, three and no color How many small cubes each have? For such problems, many students feel I do not know where to start. In fact, as long as the students carefully observe and carefully analyze, you will find that there is a certain law to find solutions to such problems. Let us through the analysis of an instance to discuss the solution to these problems.