在中考中,有一些题目用常规方法很难解出。有的是从题中给出的条件出发,需经过极复杂的计算才能得到结果;有的让人感觉条件不足,结果难以确定。因此要用新的思维方法探求新的解题途径,以达到化繁为简,化难为易的解题效果。极限法就是其中途径之一。下面笔者着眼于中考实战,与同学们分类探讨 In the examination, there are some problems that are difficult to solve with conventional methods. Some of them start from the conditions given in the questions and require extremely complex calculations to get the results; some people feel that the conditions are insufficient and the results are difficult to determine. Therefore, we must use new ways of thinking to explore new ways to solve problems, so as to achieve the effect of simplifying and simplifying difficult issues. The limit method is one of the ways. The author looks at the actual combat in the middle of the exam and discusses with the classmates