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上一讲我们谈了初中代数教学中几种主要变换——换元变换、恒等变换与同解变换的渗透。事实上,初中代数教学中还可以渗透其他的一些变换,比如“问题的变换”就是其中重要的一种。1.“实际问题——数学问题”的变换把实际问题变换成为数学问题,并用数学知识解决,从而使实际问题得到解决,这种“实际问题——数学问题”的变换,最充分地体现了数学的
On the last we talked about several major transformations in junior high school algebra teaching - commutation transformation, identity transformation and transformation of the same solution. In fact, junior high school algebra teaching can also penetrate other transformations, such as “the transformation of the problem” is one of the important. 1. Transformation of “Practical Problems - Mathematical Problems” Transforms practical problems into mathematical problems and resolves them with mathematical knowledge so that practical problems can be solved. This transformation of “practical problems - mathematical problems” most fully embodies mathematical