2. Primary school mathematics is a process of constantly asking questions, exploring problems and solving problems.
3. Primary school mathematics is a kind of thinking activity to acquire mathematical knowledge and form mathematical skills and abilities. It is self-evident to cultivate students' thinking ability through mathematics learning, especially to cultivate innovative consciousness.
4. Primary school mathematics is a guided "re-creation" process. Friedenthal, a famous mathematics educator in the Netherlands, pointed out that reconstructing knowledge with his own way of thinking is re-creation.