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What are the concepts of numbers in primary school mathematics?
Mainly includes:

(1) natural number

(2) Integer

(3) Decimals: finite decimals and infinite decimals (divided into infinite circulating decimals and infinite acyclic decimals)

(4) Score: true score, false score, with score.

There are others: reciprocity and so on.

At the same time, the initial contact with positive and negative numbers.