“对称”从一个侧面反映了数学的本质,它不仅是数学美的一种表现,也是一种常用的解题策略。利用“对称”性质解题,可出奇制胜。例两个班学生到少年宫参加活动,但只有一辆车接送。一班学生从学校坐车出发的同时,二班学生从学校步行出发。车到途中某处,让一班学生下车步行,车立即 “Symmetry” reflects the essence of mathematics from one aspect. It is not only an expression of mathematical beauty, but also a common strategy for solving problems. Use the “symmetry” nature of the problem-solving, surprisingly winning. Cases of two classes of students to the Children's Palace to participate in activities, but only one car pick up. A group of students starting from the school car at the same time, two classes of students starting from the school walk. The car somewhere on the way, so that a group of students get off the car, the car immediately