1.
Addition and subtraction of fractions
2.
triangle
3.
Addition and subtraction of decimals
4.
quadrangle
5.
broken line graph
6.
polygon

· Progress book

1.
Learning the concept
We have explained the core concepts of the textbook in detail and created concept confirmation problems to help you understand the concepts you read.
Additionally, practice problems are provided on the next page to help you immediately check whether you have understood the concept well.

2.
Building basic skills
Prepare to build your fundamentals and improve your skills with concept-based intensive problems.
Solve all the problems you need for the basics, including textbook and workbook problems, as well as descriptive and creative problems.

3.
Developing application skills
Mathematical skills can be acquired by developing problem-solving skills through applied problems.
Develop your skills by solving representative application problems for each unit.

4.
Unit assessment
We have provided problems ranging from low level to applied level to help you finish learning the unit.
We have also selected questions that frequently appear on school exams, so you can use them to prepare for regular assessments and school exams.

· Skills Enhancement Materials Collection

- You can prepare for the descriptive section by practicing step by step, starting with the follow-up questions.
- You can solve the unit assessment problems one more time.