【教学内容】苏教版四年级下册第七单元第54~55页例题和“想想做做”。【教学过程】一、复习铺垫,沟通方法师:在整数的四则混合运算中,我们已经学过了哪些运算定律?(学生回答,教师板书)师:(投影出示加法交换律和加法结合律的教材图片)我们以前学习运算律的时候,是通过解决生活中的问题,发现存在的现象,观察算式的规律,提出猜想,举例验证,得出规律,再运用规律解决问题的。(教师板书:解决问题——发现 Teaching content】 【Sujiao version fourth graders seventh unit 54 ~ 55 examples and “Think about doing ”. 【Teaching process】 First, review the bedding, communication method Teacher: In the four mixed arithmetic of integers, what arithmetic laws have we learned? (Student reply, Teacher’s Book) Teacher: (Projection shows addition and exchange law and addition law Textbooks) When we used to learn arithmetic laws, we found out the existing problems by observing the problems in our daily lives, observing the laws of the formulas, making conjectures, giving examples to verify, and drawing the law and then using the law to solve the problems. (Teacher’s Book: Problem Solving - Discovering