The so-called one-to-one correspondence is to pair more than two groups of objects one by one. ?

2. The development of conservation concept?

The so-called conservation is an understanding that the grasp of an object or a group of objects will not change because of its physical properties (shape, color, length, direction, position, etc.). ).？

3. The development of the concept of class tolerance?

Class inclusion refers to the process that subclasses merge into a general class, and the general class is divided into subclasses. In fact, the relationship between time set and subset reflects the relationship between whole and part. The formation of the concept of class inclusion requires children to have strong abstract generalization ability. ?

4. Development of sorting ability?

In finishing activities, children should constantly adjust the relationship according to the different characteristics of objects, such as length, height, thickness, weight and quantity. Finally, increase or decrease, or determine the position of the object according to certain rules. ?

5. The development of the concept of children's number?

The concept of children's mastery number includes three parts: 1. Proficient in the order of the number 2. The practical significance of the number 3. Composition of digital measurement.