Quick equations for busy 3rd and 4th graders

Basic Diagnostic Assessment of Equations

First yard.
Finding a number in addition and subtraction expressions

01 Addition and subtraction are very close!
02 Expressions completed through the relationship between addition and subtraction
03 Intensive practice of finding numbers in addition and subtraction expressions!
04 Calculate carefully, making sure there is carryover in each position.
05 Calculate carefully to see if there is any downside to each position.
06 If there are two unknown numbers, find the numbers in order from the known ones.
07 Comprehensive problem on finding a number in addition and subtraction expressions
08 Write the unknown number as □ and create an addition or subtraction equation.

Second yard.
Finding a number in a multiplication and division expression

09 Multiplication and division are also very close!
10. Complete the equation using the relationship between multiplication and division.
11 Intensive practice of finding numbers in multiplication and division facts!
Find the product using the digits in the units place of the 12th product
13 Use the calculation to check if you have correctly calculated the quotient and remainder.
14 If there are two unknown numbers, find the numbers in order from the known ones.
15 Comprehensive problem on finding a number in multiplication and division expressions
16 Write the unknown number as □ and set up a multiplication or division equation.

Third yard.
Finding a number in an expression with 〉, 〈

17 First, think of 〉 and 〈 as =, and then use the relationship between addition and subtraction.
18 First, think of 〉 and 〈 as =, and then use the relationship between multiplication and division.
19 The relationship between addition and subtraction is also evident in fractions and decimals.
When finding a number that can be 20 molecules, think of 〉, 〈 as =

Answer and solution

Quick Equations for Busy Third and Fourth Graders
Determining high scores in elementary mathematics
Get a solid grasp of 'Finding a Number'!
If you focus on only 'elementary equations' and practice intensively, you will be able to solve difficult school exam problems with ease!

■ Elementary Equations! Why Are They Important?

‘Finding a number (finding the value in □)’ is a topic that appears without fail in all elementary school math textbooks from 1st to 6th grade.

Therefore, if you skip over the content that comes up in your grade without properly learning it, you will have a hard time in the next grade.
And 'Finding a number' is one of the most common types of questions that many friends make mistakes on exams.

This book is a book that provides intensive training by collecting all the 'Finding a Number' types of math problems for 3rd and 4th graders into one volume.
Before solving a problem, you can easily understand the concept with friendly explanations, and with sufficient computational training, you can challenge yourself with gradually increasing difficulty.
You can also prepare for school exams by covering applied problems and usage sentences, so invest your time and focus for just 10 days.

■ Elementary Equations! How should I study them?

The most important thing to learn about 'elementary equations' is the method of solving them that is suitable for elementary mathematics.
If you are introduced to the concept of binomials in middle school math equations too early, you may easily make calculation mistakes by mechanically solving equations without understanding the principles behind them.
This leads to students solving problems without thinking, which prevents them from developing the ability to solve new types of problems and ultimately leads them to give up on math.

■ 3 strategies unique to the 'Busy Equation' to improve problem-solving skills

In 'Busy 3rd and 4th Grade Equations', we present a solution method that is perfect for elementary school mathematics.
First, we will teach you the basic concepts of equations: ‘the relationship between addition and subtraction’ and ‘the relationship between multiplication and division.’
And it fosters problem-solving skills by suggesting three strategies: 'drawing vertical lines in the shape of lips,' 'drawing a ladybug shape,' and 'thinking upside down.' In particular, the 'thinking upside down' strategy is a teaching tip from Dr. Hosara, who has been teaching gifted children at the Bundang Gifted Love Education Research Institute for 17 years.
Training yourself to think backwards from the calculation results also develops problem-solving skills and mathematical thinking skills that can solve difficult problems.
You can also go further and build a foundation for middle school math equations.

■ An efficient learning method that builds real skills through flexible training!

'Busy 3rd and 4th Grade Equation', like other busy series, presents a study method that builds skills more effectively while spending the same amount of time.

Steps that require simple practice can be quickly checked and passed over, and steps that require more learning are expanded and structured to allow for sufficient training.
Additionally, it is structured so that you can study intensively in a short period of time by solving 2-3 levels per day within 10-20 days.
If you study intensively, you can easily understand the overall context, which reduces the time it takes to complete a book, and like snow that piles up when you pour it down, your skills will gradually build up.

After understanding the principles of equations through 'Busy 3rd and 4th Grade Equations', and practicing with grade-appropriate strategies and even applying and utilizing word problems, you will be able to get high scores on elementary school math tests.


■ 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 progress chart or the 20-day progress chart based on the results of the '10-minute diagnostic assessment' included in this book.
If you want a quicker diagnosis, you can also check the progress chart that is right for you with the '5-minute diagnostic assessment'.


If you are a 4th grader, even if a 20-day progress chart is provided, we recommend that you focus on completing the calculations by challenging the 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 the puzzle with the teacher using 'Busy Tips' and hints from Padok!

No more mechanical, haphazard solving! From useful problem-solving tips to error-reducing tricks, this guide offers easy-to-understand tips and hints throughout the book. Even if you're working on your own, you'll benefit from learning alongside 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 more flexible structure allows you to learn more efficiently with the same investment of time, with stages that require simple practice expanded to 3 pages and stages that require more practice expanded to 4 or 5 pages.
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 prepare for descriptive problems that you will definitely encounter in school with word problems, and also develop your thinking skills with fun arithmetic playground problems that are like games.
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!