对课本中的问题,尤其是其中的“思考”问题,进行深入的思考并能进行开放性思考,思考其方法、规律、多种解法及可能的同类问题的变式等,对我们的学习是大有益处的,这也是一种锻炼智力的方法—思维体操.为阅读方便,我们把人教版七年级数学(上)课本78页的“问题”呈现如下:一辆客车和一辆卡车同时从A地出发沿同一公路 To think deeply about the problems in textbooks, especially the “thinking” issue, and to be able to conduct open thinking and think about the methods, laws, various solutions and possible variations of similar problems, etc., to our Learning is good and it is also a way to exercise intelligence - thinking gymnastics. For easy reading, we have the following “problem” on page 78 of the PEP 7th grade math (on) textbook: A bus and A truck also departs along the same road from A