很多老师都有这样的困惑:在学习了长方形、正方形面积计算之后,如果把有关周长和面积的题目放在一起,很多学生会出现面积和周长计算混淆不清的现象。尤其是计算正方形的周长和面积,出错率很高。为什么会出现这样的错误呢?不言而喻,学生对“周长”和“面积”这两个基本概念的理解不深刻、不透彻。因此,我们要想方设法,在学习周长概念 Many teachers are confused by the fact that after studying rectangular and square area calculations, many students confuse area and perimeter calculations if they put together topics on perimeter and area. Especially calculating the perimeter and area of ​​the square, the error rate is very high. Why does such a mistake occur? It goes without saying that students’ understanding of the two basic concepts of “circumference” and “area” is not profound or thorough. Therefore, we must find ways to learn the concept of perimeter