In fact, the knowledge of the first grade is very simple. Teachers pay attention to methods in class and use various teaching methods to attract children's attention (this is very important for children's learning. As long as children listen carefully, they should basically learn);

And very young children. Teachers must explain them in detail in class. Don't think you can brush it off or ignore it easily. The child's understanding is still poor.

Extended data:

Primary school mathematics is to teach children a series of knowledge about number, four operations, the calculation formula of figure and length, unit conversion and so on through textbooks, which lays a good mathematical foundation for junior high school and daily life calculation. Frieden Noel, a Dutch educator, said: "Mathematics comes from reality and must be rooted in reality and applied to reality.

Baidu encyclopedia-primary school mathematics