“打电话”是教材中的新增内容。多次实践之后,引发了笔者对如何有效开展“实践与综合应用”领域教学的思考,其中,在如何把握目标重心、如何选择好的问题以及教学展开中应注意的问题等方面有了更为深刻的认识。将“实践与综合应用”作为数学课程的一个重要领域,并不是要增加新 “Calling” is a new addition to the textbook. After many times of practice, it triggered the author’s thinking on how to effectively carry out the teaching in the field of “practice and comprehensive application”. Among them, there are more aspects such as how to grasp the target center of gravity, how to choose a good problem and the problems that should be noticed in the course of teaching Profound understanding. To “practice and comprehensive application” as an important area of ​​mathematics courses, not to add new