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本册教材内容包括:小数乘法,小数除法,简易方程,位置,多边形的面积,可能性,数学广角和综合与实践主题活动等。和实验教材相比,其中有三个单元的内容发生了较大的变化(见下表):下面,按单元顺序简单地介绍一下具体的变化。一、小数乘法1.重视算法文本的概括总结计算法则是对计算步骤的提炼和概括。表述准确、规范、精炼的法则,有利于学生准确
The contents of this book include: fractional multiplication, decimal division, simple equations, location, area of polygons, possibilities, wide angle of mathematics and synthesis and practice of the theme activities. Compared with the experimental textbook, the contents of three of them have changed greatly (see the table below): In the following, the specific changes will be briefly introduced according to the unit order. First, fractional multiplication 1. Pay attention to the general summary of the algorithm text Calculation rule is the extraction and generalization of the calculation steps. Accurate, standardized, refined rules, is conducive to student accuracy