1. Addition and subtraction of integers: master the rules of addition and subtraction of integers, including the concepts of positive number, negative number and zero, as well as the absolute value and reciprocal of integers.
2. Addition and subtraction of scores: understand the basic concepts of scores and master the laws of addition and subtraction of scores, including the same denominator and different denominator.
3. Multiplication and division: master the basic operation rules of multiplication and division, including multiplication and division of positive integers, negative integers and decimals.
4. Four operations of decimals: Understand the basic concepts of decimals and master the four algorithms of decimals, including addition, subtraction, multiplication and division of decimals.
5. Percent: Understand the concept of percentage, master the conversion between percentage and fraction, and add and subtract percentage.
6. Algebraic formula: understand the concept of algebraic formula, master the simplification and combination of algebraic formula, and solve the value of algebraic formula.
7. Geometry: Understand the basic concepts of geometry, including points, lines, surfaces and angles, and master the essence and classification of geometry.
8. Triangle and quadrilateral: Understand the basic properties of triangle and quadrilateral, including side length, angle and area, and master the classification and calculation methods of triangle and quadrilateral.
9. Data collection and collation: Understand the methods of data collection and collation, including investigation, observation and statistics, and master the methods of data representation and analysis.