Calculation is a basic skill that every middle school student must master. But in the usual teaching process, we find that students' computing ability is generally poor. Many children lack basic calculation skills and good calculation habits when calculating, and always think that "carelessness", "carelessness" and "inattention" lead to calculation errors, inattention, and students' success rate in calculating once is low. So how to improve students' computing ability? First, analyze and think about external reasons: 1, junior high school curriculum reform weakens the calculation requirements; 2. The extensive use of calculators weakens the sense of operation; 3. Teaching ideas such as reducing students' burden and happy education hinder the healthy development of students' computing ability; 4. The teacher's teaching about operation is not strong enough, and he pays more attention to mathematical problems than operation. Internal reasons: 1, not paying attention to knowledge reserve, not paying attention to foundation, not paying attention to induction, reflection and summary of mathematical thinking methods; 2. The concept is vague, which easily leads to students' operational mistakes; 3. The memory of formulas and properties is inaccurate; 4. Poor data processing ability (calculation, sorting, screening, classified discussion, etc.). ); 5. Poor mathematical language. There is no way to start the operation. 6. Lack of awareness of inspection, reflection and summary of operational problems. 7. Poor expression ability and irregular writing. 8. Poor operating habits, eagerness for success and carelessness. It got me thinking. According to the actual situation of students, how to teach students in accordance with their aptitude, how to take corresponding countermeasures, and how to train and cultivate consciously. Make students master basic calculation skills and have good calculation habits, thus helping students improve the accuracy of calculation? Second, the problem-solving strategy 1, insist on doing (2-3) questions every day; 2. Do the questions in a limited time; 3. Specification issues cannot be skipped; 4. Make good use of draft paper; 5. Correct the wrong questions and analyze the causes of the errors; 6. Use concise and reasonable methods to do calculation problems to improve the accuracy of one-time calculation; 7. Improve students' problem-solving speed and ability; 8. Cultivate students' good habit of solving problems and their interest in learning mathematics.