数与代数部分的内容包括数与式、方程与不等式、函数等三大块内容 ,它们都是研究现实世界数量关系和运动、变化规律的数学模型 .数与代数可以帮助人们从数量关系的角度更准确、清晰地认识、描述和把握现实世界 .1　教育价值初中阶段数与代数部分的教育价值主要体现在 :1.数与代 The contents of number and algebra include the contents of numbers and equations, equations and inequalities, functions, etc. They are all mathematical models for studying the quantitative relationship between the real world and the law of motion and change. Numbers and algebra can help people from the perspective of quantitative relations. To understand, describe, and grasp the real world more accurately and clearly.1 The education value of the number of junior middle school and algebraic parts of education value is mainly reflected in: 1. Numbers and generations