1, for single unit conversion, we use a nursery rhyme to teach students: big to small, long tail, just add 0. Small becomes big, remove the tail, remove 0 and grow up.

2. Convert two units into one unit and one unit into two units. In fact, it is very simple, as long as children remember which unit is big, which unit is small, and who is next to whom. (Simply put, it is the relationship between grandparents, fathers and children) Just add an adjacent unit bigger than yourself in the middle of two digits of a unit, or remove the big unit in the middle of two units.

3. Simple calculation of RMB. Perform simple decomposition operations with both hands: addition and subtraction of elements, addition and subtraction of angles, and addition and subtraction of points.

4. In the calculation of RMB, I am proficient in the most basic conversion, addition and subtraction operations without abdicating, and can ask questions and answer correctly according to mathematical information. As for abdication, subtraction and addition of carry, I don't want children and parents and friends to get too involved in this.

The importance of learn mathematics:

1. Mathematics is closely related to our life. To say that the real effect of learning mathematics is not reflected in exam-oriented education, but in my own thinking about the future.

2. The importance of mathematics is self-evident. Mathematics is the foundation of all sciences and an important channel to cultivate logical thinking. It can be said that every major progress of our mankind is strongly supported by mathematics.

3. The application of mathematical knowledge in life is everywhere. From the calculation of daily living costs, to astronomy, geography, quality control, agricultural economy, aerospace, there are shadows of using mathematics.