1 What are the contents of numbers and algebra in some primary schools? The question is rather vague. 1 period refers to the primary school 1 (3) grade. The main contents of Number and Algebra are: understanding, representation, size, operation and estimation of numbers; Letters represent numbers, algebraic expressions and their operations; Equations, equations, inequalities, functions, etc. In the teaching of "Number and Algebra", students should be helped to establish the concepts of numbers and symbols, develop their computing ability and establish model ideas. The sense of number mainly refers to the expression of logarithm and quantity, the comparison of quantity, the estimation of quantity and the intuitive feeling of operation results. Establishing "number sense" is helpful for students to understand the meaning of numbers in real life and to understand or express the quantitative relationship in specific situations. Symbolic consciousness (formerly known as symbolic sense) mainly refers to the ability to understand and apply symbols to represent numbers, quantitative relationships and changing laws; Knowing that symbols can be used for the general operation and reasoning of 1. Establishing "symbol consciousness" helps students understand that the use of symbols is an important occasion for mathematical expression and thinking. Operation is an important content of Number and Algebra, and there are rules to follow. Usually, the operation satisfies the algorithm of 1. Learning these contents is helpful to understand the law of operation and cultivate the ability of operation. Model is also an important content of Number and Algebra. Equations, equations, inequalities and functions are all basic mathematical models. Abstracting mathematical problems from real life or specific situations is the starting point of establishing models; It is the process of establishing a model and expressing the quantitative relationship and changing law with symbols; Finding the results of the model and discussing the significance of the results is the process of solving the model. These contents are helpful to cultivate students' interest in learning and awareness of application, understand the process of mathematical modeling and establish model ideas.