Primary school mathematics is a highly instrumental subject. If students do not master this tool firmly, the foundation of primary school mathematics will be very poor.

First, various algorithms are not firmly mastered, and the calculation speed is slow and the accuracy is poor.

Second, serious mathematical thinking, lack of flexibility, single problem-solving method and lack of divergent and innovative thinking;

Third, the thinking of solving problems is not clear, mathematical language cannot be formed, logical reasoning ability is poor, and formulas, laws and theorems cannot be skillfully used;

Fourth, the poor application ability of mathematics is mainly manifested in the process of solving application problems.