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《中小学数学》2016年5月刊中,贺信淳老师的《例说中学数学课中的例题教学》里主要谈最短问题的教学;向志英老师的《与轴对称相关的线段之和最短问题》里研究的也是最短问题;周胜华老师的《最短时间问题探究》里也结合实际问题谈了很多最短的实际应用.一期期刊里涉及三篇最短问题.让笔者读完期刊后结合自己今年带初三的数学教学,特别有感触.“最短”问题主要涉及的知识点:1.两点之间,线段最短;2.轴对称的性质.本次初三教学工作中,最开始遇到的最短问题,是北京市西城区初三(一模)试题的第29题的最后一
In the May, 2016 edition of “Mathematics for Primary and Secondary Schools”, Teacher He Xinchun’s “Example Teaching of Examples in Middle School Mathematics” mainly talks about teaching the shortest questions; and Professor Xiang Zhiying’s “Shortest Sum of Axis Symmetry-Related Lines” “In the study is also the shortest problem; Zhou Shenghua’s” shortest time to explore “in the actual problems also talked about a lot of the shortest practical application.A periodicals involved in the three shortest problem.When I read the journals combined with their own this year with the band The third day of mathematics teaching, in particular, have feelings. ”Shortest " The main points of knowledge involved in the question: 1. Between two points, the shortest line; 2. Axisymmetric nature of this junior high school teaching work, the first encounter The shortest problem to arrive is the last one of the 29th questions of the third day of a test in Xicheng District, Beijing