1. Variables and functions

2. Linear function

3. Look at equations (groups) and inequalities from the functional point of view.

data description

1. Several common statistical tables

2. Describe the data with charts.

3. Project learning

Characteristics of some statistical charts:

1. Bar chart features: you can display the specific data of each group.

2. Fan chart features: it can show the percentage of parts in the whole.

3. Line chart features: it can display the changing trend of data.

4. Histogram features: it can display the distribution of data.

Congruent triangle

1. congruent triangles

2. Conditions in congruent triangles

3. The nature of the angular bisector

Axial symmetry

1. Axisymmetric

2. Axisymmetric transformation

3. isosceles triangle

Integral expression

Addition and subtraction of 1. algebraic expressions

2. Multiplication of algebraic expressions

3. Multiplication formula

4. Division of algebraic expressions

5. Factorization

I found these online, but they are not necessarily Qingdao editions.