1, too many calculation errors are attributed to non-intellectual factors. Both teachers and parents blame students for the formation of good habits, such as careless attitude, carelessness and lack of inspection.
2. Improve the accuracy of calculation and overemphasize operability. Teachers often assign a large number of the same type of questions to practice repeatedly in the calculation class, and sometimes there will be a high-pressure policy of practicing more than one wrong question.
3. Arithmetic is contained in specific situations, which reduces the precision of arithmetic infiltration algorithm. Situation creation pays attention to superficial stimulation and novelty, and pays attention to too much non-mathematical information, which interferes with and weakens the learning of mathematical knowledge and skills and the development of mathematical thinking.
4. There are various algorithms, but there is a lack of communication between them. After listing the formulas, the students worked out the results from different angles according to their own experience. Teachers play one by one on the blackboard, which seems to reflect students' autonomy. In fact, the teacher didn't help students to communicate the internal relations between various algorithms, and lacked the refinement of calculation methods, which led to outstanding arithmetic, imperfect algorithms and unskilled students' skills.