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学校开运动会时,六年级学生排成了一个四层的空心方阵,他们表演彩旗团体操,最外层每边有12人。赵老师请小明帮忙算一算:1.最内一层有学生多少人?2.这个空心方阵共有学生多少人?小明通过长时间思考,又在本子上画了好几幅图,终于找到了下面的解题方法:这是一个封闭图形的植树问题,它的特点是每一层中的人数等于这一层中
When the school opened the games, the sixth graders lined up a four-story hollow square and performed in a flags group gymnastics, with 12 on each side of the outermost layer. Zhao please help Xiao Ming count: 1. The innermost layer of students how many people? 2. The hollow square total number of students? Xiao Ming through long time thinking, and in the book on the drawing of several maps, and finally found The following problem-solving method: This is a closed tree planting problem, which is characterized by the number of people in each layer is equal to this layer