Busy Textbook Operation 3-1

First yard.
addition

01.
When adding three-digit numbers, let's add the same digits together.
02.
The number carried over from the ones place to the tens place!
03.
The number carried over must be added to the tens place.
04.
The number carried over from the tens place goes to the hundreds place!
05.
The number carried over must be added in the hundreds place.
06.
Addition with two carry-overs
07.
Intensive addition practice with two carry-overs
08.
Addition with three carry-overs
09.
Addition with three carry-overs is difficult, so do it one more time!
10.
Don't forget to add the numbers you've carried over!
11.
Operations in Daily Life - Addition
First yard passage problem

Second yard.
subtraction

12.
When subtracting three-digit numbers, subtract only the same digits.
13.
If you can't subtract, round down from the tens place.
14.
If you round down, the tens digit decreases by 1!
15.
If you can't subtract, let's round down from the hundredth place.
16.
If you carry over, the hundreds place digit decreases by 1!
17.
Subtraction practice with one reversal
18.
The key is to be good at subtraction with two carry-overs.
19.
No mistakes! Subtraction with two carry-overs
20.
Subtraction with two carryovers is important, so do it again!
21.
Subtraction practice with two rounds
22.
Operations in Daily Life - Subtraction
Second yard passage problem

Third yard.
Division

23.
Expressing as a division formula
24.
Multiplication and division are very close!
25.
Multiplication formulas become division formulas! Division formulas become multiplication formulas!
26.
Finding the quotient of division using multiplication formulas
27.
Finding the quotient of a division using multiplication tables
28.
Finding the quotient of division
29.
No mistakes! Focused practice on finding the quotient of division
30.
Operations in Daily Life - Division
Third yard passage problem

Fourth yard.
multiplication

31.
(Dozens) × (How many) is simple~
32.
Add one more 0 to the calculation result of (how many) × (how many)!
33.
(Dozens and dozens)×(dozens) without any ups and downs is easy
34.
(Dozens)×(How many) quickly without any ups and downs
35.
The number rounded up from the tens place is written in the hundreds place.
36.
Multiplication practice with carry to the tens place
37.
Horizontal multiplication with carry in the tens place is also fast
38.
The rounded up number must be added to the calculation above.
39.
Multiplication practice with carry in the digits
40.
Multiplication with carry in the first place is also fast
41.
Multiplication with two carry
42.
The key is to be good at multiplication with two carry operations.
43.
Fast multiplication with two carry operations
44.
Multiplication practice with two carry operations
45.
Operations in Daily Life - Multiplication
Fourth yard passage problem

Fifth yard.
Length and time

46.
1 cm is 10 mm, 1 km is 1000 m
47.
1 minute is 60 seconds, 2 minutes is 120 seconds
48.
Add seconds, minutes, and hours
49.
Round up 60 seconds to 1 minute, and 60 minutes to 1 hour.
50.
One more time calculation with carryover!
51.
Let's subtract seconds, minutes, and hours
52.
Let's round down to 60 seconds in 1 minute and 60 minutes in 1 hour.
53.
One more calculation of the time with the reception!
54.
Operations in Daily Life - Length and Time
Fifth yard passage problem

Sixth yard.
Fractions and decimals

55.
A fraction is a number that represents a part of a whole!
56.
When the denominators are the same, the larger the numerator, the larger the number!
57.
The smaller the denominator of a unit fraction, the larger the number!
58.
A number that represents a part of a whole.
59.
Two ways to compare the sizes of prime numbers
60.
Fractions to decimals, decimals to fractions!
61.
Arithmetic in Everyday Life - Fractions and Decimals
Sixth yard passage problem

The first math book to create study habits!
All the calculations you need for this semester are covered in this book!
Busy Textbook Operations 3-1

· This semester's calculations can be solved without difficulty by taking small steps!

'Busy Textbook Calculation' is a 'school progress-tailored calculation book' that collects only the calculations needed for this semester and trains them in a smart way.
It explains things the way you would learn in a real school, and the problems are laid out in small steps so you can solve them without any difficulties.
Here are some great tips to help you understand and reduce mistakes! With the "busy tips" you'd only hear from math academy directors and the helpful hints provided throughout the book, you'll easily understand and solve problems.

· This book's clever devices help you focus your attention when you're distracted!

In 'Busy Textbook Operations', operation problems where digits are important have been edited to be calculated accurately on a grid.
Third-graders also frequently make mistakes in the "Oops! Mistakes" section, which allows them to review their mistakes again and learn faster and more thoroughly. Each page also features a target clock with a specific focus time.
This watch is not meant to urge you to speed up.
The time given is enough for a third grader to solve the problem without doing anything else.
Try to time yourself so you don't get distracted while studying.
You will experience the fun of concentration and a sense of accomplishment at the same time.


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This book is perfect for kids who haven't developed good study habits yet! Parents who have used "Busy Textbook Calculation" for the past five years have left impressive reviews, saying things like, "This is the workbook my child chose himself," "This is the first book he's finished!" and "My child, who used to hate math, says this book is fun and wants to do it again!" This book is full of touching reviews that say it's a book that really helped children develop good study habits. After solving this book, when they go to school, they'll feel more confident in class and on unit tests because they've already solved the math textbook.
Experience the joy of seeing your math skills soar with computational training tailored to the new curriculum!

· Study 'Busy Textbook Calculation' like this!

Step 1 | Essential Concept Summary: We've carefully selected and compiled only the core concepts from math textbooks!
First, you can review the key concepts you need to know for each yard, then check if you have understood the concepts correctly with the 'Quiz'.

Step 2 | Systematic Operational Training: Build your skills step by step, taking small steps.

There are no problems that suddenly jump in difficulty, so you can solve them on your own! Be sure to check out the "Computation Tips" collected from math academy directors across the country! You'll be able to solve them smoothly without any difficulties.
The "Oops! Mistake" section, which contains only the problems that third-grade students frequently get wrong, is a great place to go to solve problems that are easy to make mistakes on.

Step 3 | Bonus Problems: Build your math skills with basic word problems and fun math activities!
You can build a foundation for descriptive writing with 'Basic Sentence Problems in Daily Life' and develop your mathematical application and thinking skills with 'fun calculation activities' such as drawing and connecting lines.


Step 4 | Yard-by-yard passage problems: If you can solve the passage problems, you've finished studying this yard's operations!
It's time to check your progress with the "Pass Problems" to see if you can wrap up this lesson! If you get any questions wrong, check the relevant section and try again! It's even more effective to review before taking the unit assessment.

· A word from a parent who experienced 'Busy Textbook Calculation' in advance!

The first workbook I ever completed was 'Busy Textbook Math'.
The child was very proud after solving it all.

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This is a textbook that my son and I chose together so that we could work through one page a day.
My child solves the problems without any burden.

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As soon as the child saw it, he said, “This is it!” and sat down to solve it.
I like it very much.

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