９９年成都市中考数学Ｂ卷是选拔性质的考题，具有较高的区分度，有一定难度，尤其是第四、五两题难度较大．但是只要认真分析这些题目，会感到并不是我们想象的那么困难，试题不偏、不怪，有的还很基础。只要我们注意灵活运用已学过的基础知识，便会较容易得出解答来，如第四 99 years in Chengdu City math B volume is a test of the nature of the exam, with a high degree of distinction, there is a certain degree of difficulty, especially the fourth, five two more difficult. However, as long as careful analysis of these topics, we will feel not so difficult as we imagine, the problem is not partial, not blame, and some still very basic. As long as we pay attention to making the best use of the basic knowledge we have learned, we will find it easier to formulate solutions. For example,