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数学活动经验的建立,是一个从直观到抽象再深化的过程,也是一个不断积累提升的过程。数学思维的提升,重在积累,重在落实。笔者以人教版五年级数学上册《三角形的面积》教学为例,谈谈自己的体会。一、搭建活动平台,积累数学表象【片段一】师:请大家运用手中的学具,二个完全相同的三角形、一个圆形和一把剪刀,看看怎样才能找到三角形的面积计算方法。生:我想将三角形剪开,拼接成已经
The establishment of mathematical activity experience, is a process from intuitionistic to abstract deepening, but also a process of continuous accumulation and improvement. Improve the mathematical thinking, focusing on accumulation, focusing on the implementation. The author of PEP fifth grade mathematics book “area of the triangle” teaching, for example, to talk about their own experience. First, to build an activity platform to accumulate mathematical representations [Fragment one] division: Please use the hands of the school, two identical triangles, a circle and a pair of scissors to see how to find the triangle area calculation method. Health: I want to cut the triangle, spliced into already