The Third Closed Stamping Class in Baoding Yuan Fei School is good. In junior high school, many teachers establish a unified mode of thinking, so that students can better use all kinds of questions. For example, solving the fractional equation is divided into several steps, and factorization determines what to look at first and then what to look at, which determines the common thinking routine. Therefore, this has formed a formula for junior high school students to get used to this mechanical and easy-to-operate way in mathematics learning.