对于初中学生来说化学是一门新的学科,同时也是一门比较好学的学科,但是由于化学概念比较多,尤其牵扯到计算方面的东西,学生经常会遇见不懂的问题,想要学好这一门课,学习的方法是很重要的.“十字交叉法”是初中化学计算中比较重要同时经常用到比较简单的解题方法,很容易被学生接受,下面先从“十字交叉法”的应用范围说起. Chemistry is a new discipline for middle school students and a relatively good subject. However, due to the more chemical concepts and the computational aspects in particular, students often encounter problems that they do not understand and they want to learn this A course, learning method is very important. “Cross method ” is more important in junior high school chemistry calculation at the same time often used relatively simple problem-solving method, it is easy to be accepted by the students, following the first “cross” Law "about the scope of application.