On the whole, let children understand the shallow meaning of adjacent numbers in 1 to 10 sequence. First, explain the concept of neighborhood in children's language. The teacher shows 10 digital dolls (which can be made into finger pairs), and asks children to arrange them in order from small to large and explain why they are so arranged, so as to review the relationship between 10 and 1. The teacher manipulated finger 2 and imitated finger to speak.

"I am No.2, and my good friends are 1 in front and 3/in the back." Similarly, manipulate the finger lovers 4, and then guide the children to find the rules. In this way, according to the order in the sequence, the child infers that the best friend of 5 is the front 4 and the back 6. By analogy, children know that in the series, a number's good friends are the two numbers before and after it.

Adjacent number

Adjacent number is a mathematical term, which means that in the natural numbers arranged from small to large, the two adjacent numbers before and after a number are the adjacent numbers of the number. Example: Like 5, the adjacent numbers of 5 are 4 and 6. There are several kinds of numbers, and Arabic numerals are the most common one. Arabic numerals were not invented by Arabs, but by Indians. In fact, it should be listed as Hindi, but it spread to Arabia first and then to the world.