印度的甘地有一次乘火车去外地。他的一只皮鞋不小心掉到了车外。这时火车已经开动了,他索性脱下另一只鞋也扔出了窗外。别人问他为什么这样做,他说:“如果被穷人拾到了,就能有一双鞋了。”甘地掉鞋不是考虑捡鞋,反而扔鞋,尽可能使两只鞋在一起,发挥它应有的作用。从这里,我们不仅看出甘地的辽好心态,还能看到他在处理这件事情上运用了反向思维。反向思维,是指将人们通常思考问题的思路反过来,用对立的、看上去似乎不可能的办法解决问题的思维方法。利用这种思维方法,可以巧妙地解决很多数学问题。【例1】某数加上11,减去28,乘12,除以15,结果等于32,这个数是多少? India’s Gandhi once went by train to the field. One of his shoes fell accidentally out of the car. At this moment the train had started, and he simply took off another window and threw it out of the window. Someone asked him why he did it. He said: “If it is picked up by the poor, there will be a pair of shoes.” Instead of picking up shoes, Gandhi dropped shoes, throwing the shoes as much as possible to bring it into play Should have a role. From here, we not only saw Gandhi’s good mentality, but also saw him applying reverse thinking in handling this matter. Reverse thinking refers to the way of thinking which will solve the problem in an opposite and seemingly impossible way that people usually think about the question. Use this method of thinking, you can skillfully solve a lot of mathematical problems. [Example 1] a number plus 11, minus 28, multiplied by 12, divided by 15, the result is equal to 32, what is the number?