培养学生思维的广阔性 ,是数学教学的主要目标之一 .在平时教学中 ,我们大多进行的是求同思维训练 ,而在求异方面示例不多 ,训练也不够 ,这就势必导致学生多角度思考问题的意识不强 ,需要转换角度看问题时往往想不起来或者做不到 .就解数学题来说 ,有时也许是“灵机一动” ,但 It is one of the main goals of mathematics teaching to cultivate students’ broad thinking. In peacetime teaching, most of us are doing similar-minded thinking training. There are not many examples in seeking differences, and training is not enough. This will inevitably lead to more students. The awareness of the problem is not strong from the perspective of the problem. When you need to change the perspective to see the problem, you often can’t think of it or can’t do it. If you are solving a math problem, it may sometimes be a “smart move”, but