Operation is the basic skill to learn mathematics well. Junior high school is the golden age to cultivate mathematical operation ability. The main contents of junior high school algebra are related to operations, such as rational number operation, algebraic operation, factorization, fractional operation, radical operation, solving equations and so on. Junior high school students' poor operation ability will directly affect their future mathematics learning: from the current mathematics evaluation, accurate operation is still a very important aspect, and repeated operation errors will undermine students' confidence in learning mathematics. As far as personality quality is concerned, students with poor computing ability are often careless, with low requirements and low thoughts, which hinders the further development of mathematical thinking. From the self-analysis of students' test papers, there are not a few mistakes, most of which are operational errors, and they are extremely simple small operations, such as 7 1- 19=68, 7-9=2, etc. Although the mistake is small, it must not be taken lightly, and the real reason behind it must not be concealed by a "sloppy". It is one of the effective means to improve students' computing ability to help students carefully analyze the specific reasons for errors in operation. In the face of operation, we often pay attention to the following two points:

① Emotional stability, clear arithmetic, reasonable process, even speed and accurate results;

Have confidence and try to do it right once; Slow down and think carefully before writing; No verbal calculation, no mental calculation, no skipping steps. Write clearly on the draft paper and finally scan it with your eyes to see if there are any low-level mistakes.