因式分解是苏教版七年级下数学教材里的重点,是学生在学习了有理数和整式四则运算的基础上所进行的教学内容,在教材中起到承上启下的作用——为以后学习分式运算、解方程和方程组及代数变形提供必要的数学基础和前提.由于因式分解是整式乘法的逆向变形,进行分解时要求灵活运用,分解途径多,技巧性又强,所以因式分解又是初中数学教材中的一个难点.在具体的因式分解教学中,学生对这部分的学习较难掌握,容易出错.为进一步加深学生对因式分解的理解,培养学 Factorization is the focus of the textbook of mathematics in the seventh grade of the Sujiao edition. It is a teaching content that students carry out on the basis of learning the rational numbers and the integer four arithmetic, and plays a role in the textbook - Computing, solving equations and equations and algebraic deformation provide the necessary mathematical basis and premise.Deformization is the integral deformation of the inverse deformation, the decomposition of the flexible application of the request, the decomposition of many ways, skill and strong, so the factorization and Is a difficulty in junior high school mathematics textbooks in the specific factoring teaching, students in this part of the learning more difficult to grasp, easy to make mistakes.In order to further deepen the students understanding of factorization, training