论文部分内容阅读
本学期以来,我们根据教学改革的要求,努力改进教学方法,获得了一定的成绩。今把我们教代数“乘法公式”这一节教材的方法介绍如下。在备课时,我们着重研究了这一节教材在全部代数教学中的地位和作用,以及教学这一节教材的目的和要求。“乘法公式”在整个初等教学中是一个关键部分,学生学好了这一部分知识,就为以后学习恒等变换、因式分解和解方程等打下良好的基础;在乘法公式中,又以(a+b)(a-b)=a~2-b~2这一个公式最重要,因为很多恒等变换和计算都要应用它(?)根据以上分析,我们确定这一节教材的教学目的是使学生懂得公式(a+b)(a-b)=a~2-b~2的来源,在此基础上能够牢固地掌握这个公式,并且会运用这个公式进行有关的恒等变换和计算。然后,再进一步确定必须
Since the semester, according to the requirements of teaching reform, we have tried hard to improve our teaching methods and have achieved some success. Now we teach the algebra “multiplication formula” this section of the teaching methods are as follows. During lesson planning, we focus on the status and role of this section in all algebra teaching, as well as the purpose and requirements of teaching this section. The “multiplication formula” is a key part in the whole primary teaching. Students learn this part of knowledge well and lay a good foundation for future study of identity transformation, factorization and solution equations. In the multiplication formula, b) The formula for (ab) = a ~ 2-b ~ 2 is the most important because many identity transformations and calculations apply to it (?). Based on the above analysis, we determined that the teaching material for this section is to enable students to understand The formula (a + b) (ab) = a ~ 2-b ~ 2 sources, on this basis can firmly grasp this formula, and will use this formula for the relevant identity transformation and calculation. Then, to further determine the necessary