1.
Mixed calculations of natural numbers
2.
Divisors and multiples
3.
Correspondence relationship
4.
Reduce and common fractions
5.
Addition and subtraction of fractions
6.
Perimeter and area of ​​polygons

We are proud to say that the textbook's concept structure, which allows for 'learning concepts easily and quickly', is the best among textbooks that lay the foundation for elementary mathematics.

In addition, the appendix (1st and 2nd grades: Basic Book / 3rd and 4th grades: Textbook + Math Practice Book / 5th and 6th grades: Must-solve Workbook) is a must-solve textbook for grasping textbook concepts, and is organized differently by grade group to strengthen basic skills.

1.
[Easy!] The textbook is designed to help you easily understand the concepts through activities.
2.
[Fast!] It is composed of 20 lessons so that you can complete it by studying 5 lessons per week for 4 weeks.

"With 'Textbook Concepts', you can grasp math easily and quickly!"
[Main book]
You can see the textbook concepts and math practice problems at a glance by organizing them into spreadsheets.

You can solidify your understanding of textbook concepts through textbook activities.

[Textbook + Math Practice]
You can practice basic problems by textbook period.

You can study easily and review textbook concepts.