Chapter 1: A perfect system without any gaps, number
1.
Numbers and numerals
2.
Number is a promise
3.
Prime numbers are infinite
4.
Thank you, arithmetic
5.
Perfect mistake!

Chapter 2: Data Everywhere
1.
How to process massive amounts of data
2.
The difference between mathematical probability and reality
3.
Why Model?
4.
Living with Artificial Intelligence

Chapter 3: Functions: A Tool for Seeing the Complex World
1.
Patterns hidden in the data
2.
Equations that express the relationships in the world in formulas
3.
I just want to explain the function
4.
Language for Change, Calculus

Chapter 4: Shapes that Fill the World
1.
Points, lines, and surfaces that form a plane figure
2.
From the Pythagorean theorem to inconstructible problems
3.
Shapes used in architecture
4.
Topology with different shapes but the same essence
5.
Paradoxes in Geometry

Find the mathematics hidden in every phenomenon in the world!

“How many pieces should we cut two pies into to share among five people?”
“What is the probability that in a classroom of 25 people, there will be two friends with the same birthday?”
“What shape should I cut the sliced ​​cheese to fit my morning bun?”

This book is a youth education book that helps students discover the fun and value of mathematics through everyday questions.
Through four major topics of 'numbers, data, functions, and shapes,' it covers a wide range of topics, from the origin of numbers to fractions and rational numbers, data and statistics, calculus in natural phenomena, and geometry in art.
We avoid complex formulas or difficult explanations as much as possible, and guide people of all ages and genders to easily discover special moments of mathematics in their daily lives.
Discover special moments of mathematics in your daily life, such as fractions and rational numbers when cutting a cake, calculus when observing nature, and points, lines, and planes in works of art!

Written by a practicing math teacher!
From discussions to mission activities and in-depth learning, there's a variety of options!

The author, a practicing mathematics teacher and doctoral researcher in the Department of Mathematics Education at Seoul National University, offers a clear answer to the question, "Why should we learn mathematics?" based on his real-life experience with students and his curiosity.
Rather than focusing on complex problem-solving formulas for college entrance exams, we guide you through a broader perspective on mathematics, a discipline steeped in thousands of years of history and tens of thousands of pieces of knowledge.
Additionally, the 'Secret Mission' corner encourages readers to find their own answers to the questions posed by the author based on the contents of the book, and the 'Talk Talk Math Battle' corner allows readers to go beyond their own thoughts and share their thoughts with others by developing various perspectives and logic for the questions.
The "One Step Further, Exploration Notes" included at the end of each chapter allow you to explore interesting keywords or deeper questions related to the topics covered in the text.


Fully reflecting the secondary school curriculum!
Highly recommended by the Dictionary Teacher Review Group!
Linked to the 'Numbers and Operations', 'Data and Possibility', 'Change and Relationships', and 'Shapes and Measurement' sections learned in middle school mathematics, you can quickly and enjoyably review or advance the concepts learned in textbooks through this general education book.
Furthermore, the content has been verified and reviewed by over 10 teachers, making it even more reliable.


*Contents covered
- In Chapter 1, we will carefully examine the origins and development of the 'number system', which is the foundation of mathematical concepts, including the difference between numbers and digits, the importance of arithmetic operations, the discovery of irrational numbers, and the axiom of completeness of real numbers.
(Numbers and Operations)
- In Chapter 2, we'll explore what statistics are trying to tell us and how to uncover the stories behind the numbers.
(Data and Possibilities)
-In Chapter 3, we'll learn how to model the world through various stories related to everyday data patterns and functions, such as SNS recommendation algorithms and step count patterns.
(Change and Relationships)
-Chapter 4 explores the secrets hidden in shapes and geometry across works of art, literature, architecture, and the arts.
(Shapes and Measurements)

[Teacher's Dictionary Review Group Recommendation]
The greatest strength of this book is that it goes beyond mathematical knowledge and fosters mathematical literacy, that is, the ability to think mathematically and view the world.
_Yoon Jeong-min (teacher at Wirye Hanbit High School)

This book fosters the ability to understand the world through mathematics within a familiar subject, allowing students to experience the joy of actively exploring mathematics.
Lee Yoon-ho (Seongnam High School teacher)

For students who find mathematics difficult and distant, it will provide an opportunity to discover its beauty and usefulness, and for teachers, it will serve as a reliable guide that will enrich their classes.
_ Kang Woo-hyuk (Suwon Foreign Language High School teacher)

Through various examples from film, literature, and architecture, we realize that mathematics is not a difficult and abstract subject, but a beautiful language for understanding our lives and the world.
_ Lee Jeong-yoon (Sehwa Girls' High School teacher)

This book shows that mathematics is not just calculation, but a tool for thinking.
The equations section in particular was impressive because it explained the origins and history in an easy-to-understand way.
_ Park Hong-jae (teacher at Muan High School in Jeollanam-do)

Through this book, which kindly answers important questions that are easily overlooked when busy with studying, we hope that students who are tired of studying will experience a moment when mathematics shines.
- Choi In-seon (Sinbanpo Middle School teacher)

From the story of numbers in history to how to read the world with data and functions, it is explained naturally with interesting illustrations and examples.
- Jeong Yu-jin (teacher at Seoul Gangdong Elementary School)

This book is a valuable resource that persuasively demonstrates mathematics as a living intellectual tool, fostering students' curiosity and fundamental understanding.
-Kim Kwon-su (Teacher dispatched to Gyeongnam Mathematics and Culture Center)

Through fascinating stories and examples rarely found in textbooks, you can vividly learn how mathematics has developed and how it is used today.
- Kang Il-sun (teacher at Wiryeseol Middle School)

By learning about the intense struggles and historical background that led to the birth of a single mathematical concept, you can develop the ability to think independently.
Kim Jae-hyun (Teacher at Seoul Shinmok Middle School) [Recommendation from the Teachers' Pre-Book Review Group]
The greatest strength of this book is that it goes beyond mathematical knowledge and fosters mathematical literacy, that is, the ability to think mathematically and view the world.
_Yoon Jeong-min (teacher at Wirye Hanbit High School)

This book fosters the ability to understand the world through mathematics within a familiar subject, allowing students to experience the joy of actively exploring mathematics.
Lee Yoon-ho (Seongnam High School teacher)

For students who find mathematics difficult and distant, it will provide an opportunity to discover its beauty and usefulness, and for teachers, it will serve as a reliable guide that will enrich their classes.
_ Kang Woo-hyuk (Suwon Foreign Language High School teacher)

Through various examples from film, literature, and architecture, we realize that mathematics is not a difficult and abstract subject, but a beautiful language for understanding our lives and the world.
_ Lee Jeong-yoon (Sehwa Girls' High School teacher)

This book shows that mathematics is not just calculation, but a tool for thinking.
The equations section in particular was impressive because it explained the origins and history in an easy-to-understand way.
_ Park Hong-jae (teacher at Muan High School in Jeollanam-do)

Through this book, which kindly answers important questions that are easily overlooked when busy with studying, we hope that students who are tired of studying will experience a moment when mathematics shines.
- Choi In-seon (Sinbanpo Middle School teacher)

From the story of numbers in history to how to read the world with data and functions, it is explained naturally with interesting illustrations and examples.
- Jeong Yu-jin (teacher at Seoul Gangdong Elementary School)

This book is a valuable resource that persuasively demonstrates mathematics as a living intellectual tool, fostering students' curiosity and fundamental understanding.
-Kim Kwon-su (Teacher dispatched to Gyeongnam Mathematics and Culture Center)

Through fascinating stories and examples rarely found in textbooks, you can vividly learn how mathematics has developed and how it is used today.
- Kang Il-sun (teacher at Wiryeseol Middle School)

By learning about the intense struggles and historical background that led to the birth of a single mathematical concept, you can develop the ability to think independently.
Kim Jae-hyun (teacher at Seoul Sinmok Middle School)