"Core literacy" is a relative concept, which mainly refers to the necessary character and key ability that students should have to meet the needs of lifelong development and social development. The concept of "core literacy" was put forward by Ausubel, a famous American psychologist. He believes that the so-called core literacy of mathematics refers to the correct values, necessary characters and key abilities gradually formed in the process of mathematics learning, and its basic connotation includes the following aspects:

The first is the sense of number. That is, the cognitive ability of numerical and algebraic objects and operation results, including the ability to correctly identify and understand the meaning of numbers and symbols, can be observed and tested.

, guessing, reasoning and other methods to perceive numbers.

The second is the sense of symbol. That is, the ability to understand the meaning of symbols, including the ability to understand the relationship between symbols and operation objects and the ability to understand the meaning of operation results.

The third is reasoning ability. That is, the ability to understand the relationship between mathematical objects and operation results, including the ability to reason reasonably according to existing facts or data, and the ability to explain the reasoning process and results.

The fourth is computing power. That is, the ability to correctly express and strictly prove algebraic objects and operation results, including the ability to express things with algebraic expressions and geometric figures.