Ⅰ.
Calculation of numbers and expressions

1.
Rational numbers and recurring decimals
2.
Calculation of food

Ⅱ.
linear inequality

1.
linear inequality

Ⅲ.
simultaneous linear equations

1.
simultaneous linear equations

Ⅳ.
linear function

1.
Linear functions and their graphs
2.
Graphs of linear functions and equations

1.
Summary of key concepts
We thoroughly analyzed the 2022 revised curriculum for second-year middle school mathematics textbooks and summarized only the key concepts.

2.
Step-by-step problems
We have made it possible for you to understand the concepts on your own through the process of 'fill in the blanks → complete the process → solve it yourself'.

3.
Repeated learning of similar problems
By repeatedly practicing similar problems of the same type, you can solidify your understanding of the concepts and build your basic skills.

4.
Check yourself
It is composed of evaluation items that allow you to check your own skills based on the content you have studied through concentration and repetition.