“数缺形,少直观;形缺数,难入微”——华罗庚。具体地说,就是在解决问题时,根据问题的背景、数量关系、图形特征或使“数”的问题借助于“形”去观察,或将“形”的问题借助于“数”去思考,这种解决问题的思想,称为数形结合思想。在化学上,有很多问题也可以用这种数形结合的思想去解决。 “Lack of shape, less intuitive; lack of shape, difficult to micro ” - Hua Luogeng. Specifically speaking, in the process of solving a problem, the problem of “” can be observed by means of “shape ” or the problem of “shape ” according to the background of the problem, the relationship of numbers, the characteristic of the figure, “Number ” to think, this idea of ​​solving the problem, known as the number of forms with thought. Chemically, there are many problems that can be solved with the idea of ​​combining numbers and forms.