First yard.
simultaneous equations

01 Linear equation with two unknowns
02 Solution to simultaneous equations
03 Solving simultaneous equations
04 Solving simultaneous equations with given conditions
05 Solving complex simultaneous equations
06 Application of Simultaneous Equations 1
07 Application of Simultaneous Equations 2
08 Application of Simultaneous Equations 3

Second yard.
function

09 Function meaning and function value
10. Meaning of linear function
Points on the graph of the 11th linear function
12. Parallel translation of the graph of a linear function
13. X-intercept and y-intercept of the graph of a linear function
14 Slope of the graph of a linear function
Graphing a 15-day function
16. Graph of the linear function y=ax+b
Finding the equation of the 17th linear function
Application of 18-day functions
19 Linear functions and equations
20 Equation of a line parallel to the coordinate axes
21 Solutions and graphs of simultaneous equations
22 Applications of the Equation of a Straight Line

Middle school math is the foundation of middle and high school math!
How should I study to do well in middle school math?

· Build a solid foundation in middle school mathematics and move on!

Mathematics is a subject with a strong systematic structure, with units connected from middle school mathematics to high school mathematics.
The first semester of middle school mathematics covers algebra for all 1st, 2nd, and 3rd grades, and the content is linked from 1st to 3rd grade.
In particular, the calculation of numbers and expressions, inequalities, simultaneous equations, and functions in the second year of middle school are important units that form the basis of the algebra area of ​​middle and high school mathematics.
This book is faithful to the most basic issues that middle school students need to know.

So, what should I do first to study middle school math efficiently?
(1) It is better to solve easy problems one by one.
(2) It is better to encounter many difficult problems.

Study experts say this:
“If it is difficult to learn, it helps you remember it for a long time.
However, if the learner does not have background knowledge, the difficulty becomes undesirable.” If the math problem is too difficult without background knowledge, the brain cannot overcome fatigue and gives up on studying.
So, if you are a student who is good at math, (2) is the correct answer, but if you are an average student, (1) is the correct answer.

· Build your foundation in math with calculations and basic problems!

Operations can be said to be the basic physical strength of mathematics.
You need to build your high school math skills on the foundation you built in middle school, but if you have difficulty with calculations, it will be difficult to improve your math grades in high school.
Also, starting with a basic workbook is actually faster than solving several difficult workbooks.
By first establishing a solid foundation of conceptual understanding and calculations, you can build the strength to tackle even more challenging problems! "Busy Middle School Math" is a book that covers the fundamentals of math, including calculations and basic problem solving. It's the only book on the market designed for independent study, without the need for a teacher.

· Busy tips from a famous instructor in Daechi-dong! It feels like the teacher is right next to you.

Existing books simply collect vast amounts of knowledge into one volume, but do not teach how to study it.
So, I often relied on my teacher.
However, this book contains detailed study tips as if the teacher were teaching you face-to-face.
Each concept is explained in detail at each stage, and the "Busy Tips" from Daechi-dong's renowned instructors are included, making it easy to understand even when studying on your own.
Additionally, the author provides video lectures on concepts at every step of the book, allowing you to hear explanations of the concepts directly.

· The first semester is divided into two volumes, containing the largest number of problems by type!

Once you understand the concept, you should now practice solving enough problems until you feel comfortable with the concept.
'Quick Middle School Math for Busy Middle School Students' contains the largest number of problems by area, from easy problems to school exam-type problems, to ensure sufficient math training.
So, I divided the first semester of the second year's mathematics into two volumes.
As you solve the problems in this book, a problem-solving circuit for each type will naturally form in your head.

· 70% of middle school students get this problem wrong, solved with the "Oops! Mistake" and "Let's Go! ×Man and ○Man" corners!

Even friends who are good at math often lose points due to calculation mistakes.
This book has a special device in place to prevent you from receiving a lower score than your actual ability due to calculation errors.
In the "Oops! Mistake" section on the concept page, we've compiled the points of error that 70% of middle school students frequently make.
Additionally, the 'Go! ×Man and ○Man' corner allows you to check at a glance which calculations are correct and which are incorrect, which helps to drastically reduce calculation errors.

Additionally, at the end of each stage, we've included 'free exam questions', suggesting middle school exam questions that can be solved just by practicing in this book.
There are many school exam questions that can be answered correctly just by solving all the problems in this book.

If you're a middle school student, it's time to organize your concepts and learn problem-solving techniques! "Busy Middle School Math" will help you.
Build a solid foundation in middle school math with this book!

· How to effectively view the 'Busy Middle School Math and Geometry' series

The 'Busy Middle School Math and Geometry' series consists of two volumes of 'Busy Middle School Math' for the first semester and one volume of 'Busy Middle School Geometry' for the second semester.

1.
Want to strengthen only your weak areas? - Choose just one of the three books!
If you find calculations of numbers and expressions or inequalities difficult during the middle school 2nd grade curriculum, choose and organize Middle School Operations Volume 1, “Calculation of Numbers and Expressions, Inequality Area”; if you find simultaneous equations and functions difficult, choose Middle School Operations Volume 2, “Simultaneous Equations, Function Area”; if you find shapes difficult, choose and organize Middle School Geometry, “Properties of Shapes, Similarity of Shapes and Pythagorean Theorem, Probability”.
Even if you are a 2nd or 3rd year middle school student, focus on studying your weak areas to quickly make up for your learning deficits.

2.
What if I am a second year middle school student but weak in math, or a first year middle school student preparing for second year middle school math?
Study in the following order: [Middle School Math Volume 1 → Middle School Math Volume 2 → Middle School Geometry] according to the progress of middle school math.
You can solve basic problems, so you can build a solid foundation for middle school mathematics.

3.
What if you are a teacher at a school or a study room?
1) For students who lack basic knowledge, briefly explain the concepts and then use it as a self-study material.
2) For students who have mastered the concept, use it as a textbook for homework.
3) It is suitable as a short-term textbook for vacation to supplement light pre-learning and learning deficits.

*Busy Middle School 2 Operations Volume 1 consists of 22 steps, Volume 2 consists of 22 steps, and each step can be solved within 1 hour.