1.
Range and estimation of numbers
2.
Multiplication of fractions
3.
Congruence and symmetry
4.
Multiplication of decimals
5.
rectangular solid
6.
Average and probability
Answer and explanation

Throw away problems for the sake of problems!
Only the problems necessary to solidify the concept have been carefully selected!
The most important concepts in math explained in an easy-to-understand way!

1.
5th graders learning to multiply fractions and decimals
The four basic operations occupy the largest portion of elementary mathematics.
Starting with the four basic arithmetic operations in the natural number range, the scope expands to the four basic arithmetic operations involving fractions and decimals.
However, the four basic arithmetic operations involving fractions and decimals are actually very similar to the four basic arithmetic operations involving natural numbers.
Just as multiplication is used in division of natural numbers, division involving fractions or decimals is also calculated using multiplication.
So, multiplying fractions and decimals is important, right? We'll learn this important subject in the second semester of fifth grade.

Elementary Key Math, which grasps concepts through pictures, unfolds the content step by step and explains everything mathematically without omitting the reasons why calculations must be made in that way.
Additionally, we provide key content in visual form so that you can remember it for a long time.


2.
5th grade, the foundation of abstract mathematics
Above, below, over, and under are concepts that we continue to encounter not only in middle school but also in high school.
Of course, the concept itself is not difficult.
But the problem arising here is not simple but difficult.
This is because problems arise that require reasoning while considering each possibility.
And in fact, excess and deficiency are highly abstract mathematical concepts.
To be more or less than a number means to be a number that is slightly larger or smaller than that number without including it. This is connected to the infinity of numbers, and space is also defined with this concept.
The average and probability are also things that come up in 5th grade.
Since this is a concept that first appears in elementary school, it is something that is easily covered and passed over.
However, as it is an important topic that will be dealt with when studying mathematics in the future, elementary key mathematics, which grasps concepts through pictures, is developing the content so that averages and possibilities can be studied step by step and mathematically in an easy and fun way.


3.
The concept is complete! Tightly! Without any omissions!
Any term has a meaning implied within it.
So, elementary school key mathematics, which uses pictures to grasp concepts, puts a lot of effort into explaining the meaning of words and terms.
It helps you remember unfamiliar mathematical terms for a long time by connecting them with their meanings, and naturally derives the properties and characteristics derived from them.
Even the smallest details explain why they are calculated that way and why they are named that way.
If you know the meaning of a word, you will remember it longer and will be less likely to confuse it with something else.
Even if you solve the same problem, there is a difference between solving it knowing the principle and solving it without knowing the principle.
Now that we know, let's solve it!

4.
Problems that make the concept completely mine
Elementary Key Math, which helps students grasp concepts through pictures, presents problem-solving methods that help them make the concepts truly their own.
Rather than simply listing the problems in order from easy to difficult, the problems are listed step by step so that you can practice the concepts step by step.
Solving any math problem requires going through several stages of thinking.
It arranges problems step by step, from those that are easy to solve to those that require long, deep thinking, so that you can fully digest and absorb the concepts you understand.

5.
All video lectures are provided for free!
You can watch the orientation lecture by scanning the QR code on the book cover.
You can check what content is included in the book and how to study math effectively.
And you can study all concepts and problem solving from the first to the last unit by watching video lectures.
Simply download the video player app and scan the QR code to watch the lecture right away without any separate registration.
Check out this delightful, refreshing, and exhilarating lecture from a former EBS math teacher right now.

★★★ Great for students like this!
*Friends who are good at finding answers, but don't know the concept when asked about it
*Friends who sometimes get the same type of problem right and sometimes get it wrong
*Friends who want to know the joy of mathematics
*Friends who want to study math in a fun way

★★★ 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.