4.
Multiplication of rational numbers
1.
What is multiplication?
2.
Multiply by -1 (1)
3.
Multiply by -1 (2)
4.
Multiplication of integers (1)
5.
Multiplication of integers (2)
6.
Multiplication of rational numbers
7.
Multiplication Rules
8.
Multiplication of multiple numbers
Unit conclusion
Take a break

5.
Applications of multiplication
1.
What is exponentiation?
2.
Calculating exponents (1)
3.
Calculating exponents (2)
4.
exponentiation of fractions
5.
Multiplication of exponents
6.
Distributive Law (1)
7.
Distributive Law (2)
8.
Distributive Law (3)
Unit conclusion
Take a break

6.
Division of rational numbers
1.
Division with negative numbers
2.
Division of integers (1)
3.
Division of integers (2)
4.
Division of rational numbers
5.
Mixed calculations of rational numbers
6.
Utilization (1) Expression with □
7.
Utilization (2) Inequality
8.
Usage (3) ~ as big/small number
Unit conclusion
Take a break

Summary problem

Answers and Explanations

In Volume 1, we covered what integers and rational numbers are and how to add and subtract them.
And in Volume 2, we focus on multiplication and division of integers and rational numbers.
Starting with the multiplication learned in elementary school, we first show the big picture of what new multiplication will be learned in middle school, and then approach it step by step to cover the principles of multiplication of rational numbers.
It shows with pictures what it means to multiply by -1, which is a new feature in middle school, and helps you express it in simple words, while also kindly explaining how to write it in an equation.
In middle school math calculations, students often make mistakes when dealing with the “- sign.” Here, we will study the multiplication by -1 in various ways and perform calculations according to the principles, so we will definitely be able to reduce mistakes related to signs.
The division of rational numbers section starts with division with negative numbers, covers division of integers, and even covers division of rational numbers and mixed calculations.
You can easily master various practical problems, so it will be enough to prepare for school grades.
In this way, Volume 2 of “Integers and Rational Numbers Come First” focuses on multiplication and division of integers and rational numbers, but it also contains the basic principles of calculation and the application of operations so that students can sufficiently learn them.
Additionally, we have included problems that allow you to check the overall content along with the content of Volume 1.
Master integers and rational numbers with Volumes 1 and 2 of “Integers and Rational Numbers Come First”!

1.
Presenting the principles of calculation in various ways
In Volume 2 of “Integers and Rational Numbers Come First,” the meaning of multiplying and dividing negative numbers is explained mathematically.
We explain multiplication and division of negative numbers in a variety of ways, but you'll find that no matter which approach you take, you'll get the same result.
This will help you develop flexibility in your thinking and experience the joy of mathematics.
〈Integers and Rational Numbers Come First〉 is a book about how to do the four basic arithmetic operations with integers and rational numbers, which are new to middle school, but it explains not only the calculation methods but also the principles very well.
There is a big difference between knowing the principles of why calculations are done and simply doing the calculations.
Knowing the reason and doing the calculations makes it fun and possible to apply it.
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 order to fill in such gaps, in “Integers and Rational Numbers Come First,” the content is tightly structured, presenting sound logical grounds even for the smallest details.

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," a book with an intuitive design that allows you to 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."

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.