在教学中，我们经常发现：有的学生遇到一个应用题，一遍一遍地读题，看着问题发愣，却无从下手；而有的学生面对一个应用题立刻意识到，此路不通，另寻它径，迅速列出合理简洁的算式。前者思维呆板的表现，把着眼点放在一点上。而后者就具备良好的思维品质，它一般包括敏捷性 In teaching, we often find: Some students encounter an applied title, read the title over and over again, looking at the problem stunned, but no start; while some students immediately face an application of the problem that the barrier, the other Find it and quickly list reasonably concise formulas. The former thinking dull performance, the focus on a little bit. The latter has a good mindset, which generally includes agility