今天给学生讲了梯形的面积,在教学中我是这样设计的,先复习了长方形、正方形、平行四边形的面积计算公式以及平行四边形的面积计算公式的推导过程,然后提出让学生思考平行四边形的面积计算公式的推导过程应用到“转化”的思想。而后让生动手操作,把要计算面积的梯形转化 Today, I talked about the trapezoidal area to the students. In teaching, I designed it. I first reviewed the area calculation formulas of rectangles, squares and parallelograms, and the derivation of the area calculation formula of parallelograms. I then proposed that students should think about the parallelogram The derivation of the area formula applies to the idea of ​​transformation. Then let the vivid hand operation, to calculate the area of ​​the trapezoid transformation