These days are still doing math questions. It is rare to find reasonable logic thinking in the process of doing questions. It is often necessary to think about the relationship between them. The skill is the summary of the experience of solving the problem, and we are Learning often learning skills, rather than through reasonable logic ideas, so we must improve the logical thinking ability must directly go to the question, to form a spiritual idea, clear direction, more consider the nature and characteristics of the problem, And some regular things, constantly find reasonable ideas, so there will be quality improvements.