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在分数乘分数教学中,教师很难让学生明白其中算理的分析过程,主要原因在于:其思维过程较长,需要学生有多角度看待同一问题的意识,画直观图又存在先画部分和后画部分的顺序问题,且过程复杂。于是,我制作了一个教具以辅助教学,取得较好效果。现介绍如下:制作方法:取20块5×4×0.3cm的木片或塑料薄片,在一装有底座的平木板上拼成一个长方形,如5×4的规格:粘贴一张大小刚好的白纸。
In fractional-fractional teaching, teachers find it hard for students to understand the analysis process in which arithmetic is mainly due to the fact that they have a long thinking process and require students to have a multi-angle perspective on the same problem. Drawing intuitively there is a part of drawing first After painting part of the order problem, and the process is complicated. So, I made a teaching aid to assist teaching and achieved good results. Now introduced as follows: Production methods: Take 20 pieces of 5 × 4 × 0.3cm wood or plastic sheet, in a flat wooden floor with a rectangular plate, such as 5 × 4 size: Paste exactly the same size white paper.