Minority Diagnostic Assessment

First yard.
Addition and subtraction of decimals

01.
Addition of decimals, the decimal point is the standard!
02.
Subtraction of decimals is also based on the decimal point!
03.
What happens if you add a decimal point to a natural number? Decimal
04.
Comprehensive addition and subtraction problems with decimals

Second yard.
Multiplication of decimals

05.
Make sure that the decimal point of the multiplied number is in the same position!
06.
It's okay to swap the multiplying number and the multiplying number.
07.
Decimal point.
Left is 0.1x, right is 10x
08.
The decimal point is the sum of the digits after the decimal point!
09.
Comprehensive multiplication problem of decimals

Third yard.
Division of decimals

10.
The position of the decimal point of the quotient is the same as the divisor.
11.
If the quotient is less than 1, write 0 in the ones place.
12.
You can add 0's to the end of the decimal place indefinitely.
13.
If you can't divide by the number, remember 0
14.
For natural numbers, put the decimal point and calculate by lowering it to 0.
15.
If you move the decimal point the same way, the quotient remains the same.
16.
It's easier to make the divisor a natural number
17.
Even if the decimal point of the quotient changes, the decimal point of the remainder remains the same.
18.
You can express the quotient even if it is not divisible
19.
Division of decimals comprehensive problem

Fourth yard.
Mixed calculations with fractions and decimals

20.
Represent decimals as fractions with denominators of 10, 100…
21.
If fractions and decimals are mixed, unify them into one.
22.
When it is not divisible, change the decimal to a fraction
23.
Let's solve it while remembering the order of calculation of mixed natural numbers.
24.
Comprehensive problem solving on mixed fractions and decimals

Correct answer

5th and 6th graders, we are busy!
Older students need a special math book for older students.

- The 'calculation skills' you must have before entering middle school

80% of elementary math is operations.
Therefore, one of the skills that you must have before going to middle school is the ability to do calculations.
There's more and more to learn, so you can't afford to lose power in calculations.
So, we need to acquire computational power even now.
If you are a 5th or 6th grader who cannot devote enough time to calculations, you can follow the next progress without any problems by practicing only the calculations you are not confident in using the 'busy calculation method'.

- “Prior learning does not automatically improve computational ability!”

Even the top 1% of students attending academies are trained to perfect their calculation skills, regardless of their progress.
Even the principal who taught a student who won first place in a math competition said, “Computational ability cannot be improved by itself by prioritizing math progress or by developing thinking skills.
As far as computational ability is concerned, it must be mastered through repeated training.
“Because the problem-solving ability can be improved only when the operation is solved first,” he says.
For just 10 days, focus on practicing operations that don't work, whether it's fractions, decimals, multiplication, or division.

- Training by area is effective! "Are you weak at fractions? I'm weak at division."

Our country's elementary school textbooks comprehensively teach various areas such as operations, shapes, measurement, and probability.
For example, even with division, students often forget what they learned in the past because they learn it little by little from 3rd to 5th grade.
That is why, as students progress through higher grades, it is more efficient to focus on only the areas they are weak in, such as fractions, decimals, multiplication, and division.

Operations, the foundation of mathematics, are like building blocks.
If you have a deficit in the front, the deficit will accumulate as you go back, making it impossible to build the great house called mathematics later.
Especially if you are not fully prepared for multiplication and division in the 5th and 6th grades, you will not be able to multiply and divide fractions, decimals, or calculate shapes.
When you have time to focus, like during a vacation, why not focus on training and strengthening the areas you consider weak?

In the case of famous academies, they say that for students who are not good at math, they collect specific math from various books and then train them in math.
You already know the power of a comprehensive summary by area.
(Now, that academy can train using the 'Busy Operation Method' without having to bother looking through multiple books, right?)

- Just as snow piles up only when it pours heavily, you need to focus on your studies to build up your skills!

Have you ever seen snow pile up? When it stops snowing, it all melts away, but when it pours down, it piles up on the ground.
The same goes for studying.
If you study little by little, one step at a time every few days, what you learn will not accumulate and will melt away like snow.
If you focus and study hard, your skills will gradually build up.
The 'Busy Operation Method' series consists of 4 volumes, each with steps 23 to 26.
It is more efficient to solve 2-3 steps per day in 10-20 days than to solve them over several months.
If you focus and study, you will be able to easily understand the overall context, which will reduce the time it takes to solve a single book.
If you immerse yourself in one thing for a short period of time and learn it, you will become proficient in it.


- It got better thanks to the feedback from the academy teachers and readers!

'Busy Operation' has been republished to reflect the revised curriculum.
In this edition, we have taken into account the feedback from students, parents, and academy teachers who have already solved the 'Busy Operation Method' for several years to further enhance the learning effect.
To this end, we collected about 30 textbooks that students had worked on themselves and identified actual learning patterns, such as how the students solved the problems and which parts they frequently made mistakes in.
We also communicated with parents and teachers at the academy about how the child's learning was progressing.
We've compiled the vivid opinions of our readers into a list of 'truly effective methods' and 'directions that provide direct help.'


Features of this book

1) Just 10 days to shape your math life! Customized learning is available at home after a diagnostic assessment!

We applied the actual diagnostic assessment methods of math academy directors to accurately diagnose your child's current learning status and create a customized learning plan even at home.
You can choose to study using either the 10-day or 20-day progress chart based on the results of the '15-minute diagnostic assessment' included in this book.
If you want a faster diagnosis, you can also check the progress chart that is right for you with the '7-minute diagnostic assessment'.
If you are a 6th grader, even if a 20-day progress chart is provided, we recommend that you focus on completing the calculations by challenging yourself with a 10-day progress chart.
Just 10 days to address your learning deficits will be a crucial turning point that will determine your future math career.


2) Don't solve it unconditionally! Look at the concept and 'get the feeling~'

If you solve problems without properly understanding the concepts, you may hit a wall at some point.
Just as you need to consume a balanced diet to build basic physical strength, you need to learn concepts and principles during the training process to build a healthy foundation.
Unlike training books that only contain calculations, Busy Operation Method includes 'concepts at a glance' for each lesson.
It is helpful for friends who are learning on their own, as it allows them to understand the principles and practice calculations through friendly concept explanations that can be understood just by looking at the title.

3) The teacher in the book! Solve problems with the teacher using "Busy Tips" and "Oops! Mistakes!"

No more mechanical, uninspired solutions! This revised edition, inspired by the opinions of math academy directors, includes helpful tips throughout the book, as if you were right there with a teacher.
From helpful "busy tips" to minimize mistakes, to "Oops! Mistakes" to help you avoid mistakes, this book is packed with calculation tips from the directors of math academies in Daechi-dong, Gangnam, and Ilsan. Even if you're working independently, you'll enjoy the benefits of studying with a friendly teacher.

4) Scientific learning design! Baboo's "small steps" method builds skills!

No more mechanical, repetitive calculations! We've structured it so you can quickly learn the easy parts and practice more on the more challenging ones.
The revised edition has a more flexible structure, with steps that require simple practice expanded to 3 pages, and steps that require more practice expanded to 4 or 5 pages, allowing you to learn more efficiently with the same investment of time.
Additionally, the level of immersion has been further increased by designing the stages meticulously and scientifically using the 'small step' method of Busy, which gradually increases the level and challenges.
It doesn't suddenly become difficult, so anyone can immerse themselves in it until the end and build their skills.

5) Understand the language of daily life and make it your own, and you will gain confidence naturally!

It doesn't end with just practicing simple calculation problems.
You can organize everyday concepts into easy sentence problems, then practice mixing them up at the end of each section, and even encounter comprehensive problems that are fun to play and end with.
These problems are a combination of the word problems and comprehensive problems you'll encounter in school, helping you develop your thinking skills and prepare for descriptive questions.
This book is not just about calculations, but it is more than just a book about calculations, and it helps you develop the problem-solving and creative convergence skills required by the current curriculum!