小学数学第九册“平行四边形的面积公式的推导及其运用”这一节教材是在学生学过面积的概念,面积的单位、长方形和正方形面积公式以及平行四边形概念的基础上进行教学的。本节的教学任务是:使学生理解和掌握平行四边形的面积计算公式,能够运用公式正确地计算平行四形的面积。教学难点是平行四边形面积公式的推导。为了使学生顺利地学好上述知识,我采取了以下几点较为有效 The elementary mathematics ninth volume “parallelogram area formula derivation and its application” section of this textbook is learned in the area of ​​students concept of area, area units, rectangular and square area formula and parallelogram concept based on teaching. The teaching task in this section is to enable students to understand and grasp the area calculation formula of parallelogram, and to calculate the area of ​​parallelogram correctly by using the formula. Difficult teaching is the derivation of parallelogram area formula. In order to enable students to successfully learn the above knowledge, I have taken the following points more effective