1.
number
1.
Natural numbers, fractions, and decimals (1)
2.
Natural numbers, fractions, and decimals (2)
3.
A number less than 0
4.
vertical
5.
absolute value
6.
Integers and rational numbers
7.
Meaning of positive and negative numbers
Unit conclusion
Take a break

2.
Addition of rational numbers
1.
Meaning of + and -
2.
The meaning of addition
3.
sum of the same signs
4.
Addition on the number line
5.
Addition with Go stones
6.
The sum of two numbers with different signs
7.
Law of addition
Unit conclusion
Take a break

3.
Subtraction of rational numbers
1.
Subtraction is the opposite of addition (1)
2.
Subtraction is the opposite of addition (2)
3.
Subtract with a Go stone
4.
Addition and subtraction of rational numbers
5.
Addition and subtraction of fractions and decimals
6.
Simplify the equation
7.
Calculating expressions without parentheses
8.
Addition and subtraction of multiple numbers
Unit conclusion
Take a break

Answer and explanation

1.
Presenting the principles of calculation in various ways
In elementary school, we only dealt with numbers greater than 0, so we could express the size of numbers as quantities.
So, addition and subtraction could be explained in the same way as collecting and dividing.
Because newly emerging integers and rational numbers include negative numbers, it is difficult to express the size of the numbers in terms of quantities.
So, in 『Integers and Rational Numbers Come First, Volume 1』, the calculations of integers and rational numbers are explained in detail using number lines and Go stones that can represent positive and negative numbers at the same time.
There's a big difference between doing a calculation knowing why you're doing it and doing it without knowing why.
When you do calculations, it is more fun and you can apply them if you know the reason.
Study math the way it should be done and improve your logical thinking skills with this book! You'll also discover systematic and detailed explanations!

2.
Present the basis of logic!
Because mathematics is structured logically, if there is a hole at any stage, it is difficult to build new knowledge thereafter.
However, learners often neglect to study the parts that do not appear on the test.
It may be okay now, but over time, this will create gaps in your logical thinking, which will hinder your ability to learn math properly.
In 『Integers and Rational Numbers Come First 1』, we have organized the content tightly, presenting sound logical grounds even for the smallest details, to fill in such gaps.

3.
The important thing is big! In image!
You might think a book that explains abstract mathematical concepts mathematically would be difficult, right? Not at all!
This book explains abstract concepts in a way that is easy for learners to remember.
The content is developed with interesting materials and pictures, and the intensity of the content is effectively expressed so that important information can be seen at a glance.
Discover "Integers and Rational Numbers Come First 1," a book with an intuitive design that lets you understand concepts at a glance, rich explanations, and comprehensive problems.

4.
Very, very friendly answer sheet!
Even though we know how to solve a problem, there are more cases than you might think where we make mistakes in calculations.
And sometimes, when you're so absorbed in calculating something, you forget what you were calculating.
Here's a special answer sheet to help you answer all the questions you know.
The entire calculation process is detailed, as if the teacher had solved it by hand, and various clues hidden in the problem are highlighted with colors and arrows, so that you can intuitively know how to use them at which stage.
Let's upgrade our friends' calculation skills to the next level with the special answer sheet for 『Integers and Rational Numbers Come First 1』.

5.
Free video lectures so you can study on your own!
This book provides video lectures on every page from beginning to end.
Because it includes complete concept explanations and problem-solving, you can study the entire book along with the lectures, or you can use the lectures to only cover the parts you need.
You can view the lecture immediately by scanning the QR code without separate registration, and you can check out more reference materials by visiting www.mathbus.co.kr.
Have fun studying with a former EBS teacher's cheerful, refreshing, and exhilarating lectures!

★★★ Great for students like this!
*Students who are good at finding answers, but don't know the concept when asked about it
*Students who seem to know, but don't know how to solve slightly difficult problems.

★★★ A math book worthy of being called math!!
Mathematics is often said to be beautiful because it presents the content in a clean and uncluttered way.
Discover integers and rational numbers solved in the most mathematical way possible right now.

★★★ A book that proves that math books can be pretty too!!!
A math book with a pastel-toned layout that resembles a fairy tale has been published, unfolding mathematical concepts through illustrations.
Add fun to your studies with these pretty math books.