In primary school mathematics learning, there are many contents about four arithmetic rules, arithmetic rules and their properties, calculation formulas, etc. These contents are not only the generalization and summary of quantitative relations and spatial forms and their calculation rules in the real world, but also the specific provisions of the specific implementation rules of the calculation process. Here, we collectively refer to these contents as mathematical rules, and students' learning of these contents is called learning of mathematical rules. Because mathematical rules reflect the relationship between several mathematical concepts, their learning level and complexity are higher than others.

Students' mastery of mathematical laws is mainly reflected in the following aspects.

First, to understand the derivation and summary process of mathematical rules, we should not only understand how each mathematical rule is stipulated, but also understand why it is so stipulated, so as to clarify the rationality and necessity of mathematical rules; Secondly, we should flexibly apply the summarized mathematical laws to various specific situations to solve the corresponding problems, and the application level of some basic mathematical laws (such as four arithmetic rules, arithmetic rules, calculation formulas, etc.). ) to achieve a relatively skilled level; The third is to master the relationship between different mathematical laws and make clear their differences and connections.