1.
large number
2.
angle
3.
multiplication
4.
Division (1)
5.
Division (2)

A unit-by-unit arithmetic reinforcement textbook covering all elementary arithmetic problems.

1.
Complete computational learning in one semester, completed in one volume
2.
Provides a study guide that presents the content and problem types to be learned on a daily basis
3.
Image association learning that makes computational principles easy and long-lasting to remember
4.
One-page per day composition that never gets pushed back

1.
Master the principles of operation

The principles of calculation are explained in detail and organized using image association methods, so you can learn calculation methods easily and enjoyably on your own.

2.
A comprehensive guide to elementary arithmetic problems

This book covers not only the areas of numbers and operations, but also the areas of shapes, measurements, changes and relationships, and data, so you can completely complete the semester's computational learning in one book.

3.
Strengthening problem-solving skills through textbook-linked learning

We have made learning easier by specifying the unit name of the operation being studied, and have provided word problems at the level of a textbook in the 'Strong Operations in Textbooks' corner to help students develop problem-solving skills.