1. Non-intelligence factors are important reasons for students' mistakes.

(1) Students have insufficient understanding of the importance and necessity of learning, unclear learning objectives, low interest in solving problems, and wrong calculation results.

(2) When calculating, I hope to work out the result as soon as possible. When the number of calculation questions is large or too complicated, it is easy to have rejection psychology, so it is not careful to analyze and examine the questions carefully, and it is perfunctory.

2. The concept is not clear.

3. The ability of attention distribution and transformation is poor.

Second, several methods to cultivate students' computing ability

1, pay close attention to enlightenment education and implement the foundation.

2. Dealing with the relationship between lectures and practice, junior high school students' intuitive thinking is still dominant, and abstract logical thinking and its profundity are poor.

3. Master the operation skills.

4. Keep in mind the order of elementary arithmetic and attach importance to the level of problems.

5. Pay attention to cultivate good calculation habits.