在解计算题时,学生经常犯以下错误:要么审题不仔细就开始答题,要么没看完题目就急于答题,或者因文字描述太多,看了后面忘了前面,导致理不清各种已知量和未知量之间的关系,于是无从下手。为了帮助学生学会仔细审题,达到迅速理解题意及正确解题的目的,笔者从多年的教学实践中,逐步摸索总结出用框图法解计算题的方法。 Students often make the following mistakes in solving calculation questions: Either the trial questions are not started carefully, or they are not eager to answer the questions after reading the essay, or because the text is described too much, the front is forgotten, the other one is not clear The relationship between the amount of knowledge and the unknown, so no way to start. In order to help students to learn carefully exams, to quickly understand the problem and the purpose of correct problem solving, the author from years of teaching practice, and gradually summed up the method used to solve the problem with block diagram method.