First, you can count.

You can count skillfully from "1", or you can count backwards or forwards from a number in the middle. Generally, you can start counting from 1, but if you start counting from a certain number in the middle, you may not know it, or children will know it from 9- 10,19-20,29.

For example, you can count up to 100 by mouth, count up to 20 objects from any one in the middle, exclude the interference of object size and arrangement, and tell the total number of objects. You can count backwards from 10 to 1, from any number within 10 to 1, and you can take out the same number of objects according to the number of objects or verbal prompts. You can count by 2, 5, 10.

Second, the meeting order

Generally, children are asked to count from 1, and the order is fixed. On this basis, let the children draw inferences about a certain number and ask them what is the adjacent number, such as what is before 5? What's behind? Count forward from 5, count backward, count forward from 1 1, count backward.

Sorting refers to arranging a group of objects in order according to the differences of some characteristics (such as length, height, size, quantity, weight, height, etc.). ) or according to a certain law (such as from long to short, from long to short, from long to short, from long to short, etc. ).