rational number

1. 1

Positive and negative numbers

1.2

rational number

1.3

Addition and subtraction of rational numbers

1.4

Multiplication and division of rational numbers

1.5

Power of rational number

chapter two

Addition and subtraction of algebraic expressions

2. 1

Integral expression

2.2

Addition and subtraction of algebraic expressions

chapter three

One-dimensional linear equation

3. 1

From Formula to Equation

3.2

Solving One-dimensional Linear Equation (Ⅰ) —— Merging Similar Term and Moving Term

3.3

Solving linear equation of one variable (Ⅱ) —— Removing brackets and denominator

3.4

Practical problems and one-dimensional linear equations

chapter four

A preliminary understanding of graphics

4. 1

Color graphics

4.2

Line, ray, line segment

4.3

corner