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2003年的高考数学试卷中有这样一道试题:如图,一个地区分为5个行政区域,现给地图着色,要求相邻区域不得使用同一颜色。现有4种颜色可供选择,则不同的着色方法共有多少种?由于我们在数学活动课中讲过加法原理和乘法原理等有关知识,因此我出示此题试着让同学们动动脑筋,做做看。
2003 college entrance examination mathematics papers have such a test: Figure, a region is divided into five administrative regions, is to map coloring, requiring adjacent regions shall not use the same color. Since there are 4 different colors to choose from, how many different coloring methods are there? Since we talked about the principle of addition and the principle of multiplication in mathematics activity class, I showed this question to let students move their brains, Do look.