When solving the application problem, in order to solve the problem conveniently, the problem is divided into limited situations that are not repeated or omitted, and analyzed and solved one by one, so as to finally solve the whole problem. This kind of analysis, solution

The solution to the problem is called enumeration. Enumeration is also called enumeration or exhaustive.

When using enumeration method to solve application problems, the conditions in the problems are often arranged in the form of lists, and sometimes drawing is needed.