“差量法”是解化学计算题中应用非常广的一种方法,很多化学教师只是讲“差量法”在化学计算中的运用,而“差量法”的数学依据是什么?大多教师并没有讲清。笔者认为化学教师在讲化学计算题时,每一种方法的数学依据必须向学生解释清楚,否则学生就会感到只知其然,不知其所以然。 “Difference Method ” is a widely used method in chemistry calculation. Many chemistry teachers just talk about the use of “difference method ” in the calculation of chemistry, and the mathematical method of “difference method ” What is the basis? Most teachers did not make it clear. The author believes that when a chemistry teacher talks about a chemistry calculation problem, the mathematical basis of each method must be clearly explained to the students, otherwise the student will only know what they are doing and do not know why.