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Concept + Operation Light Elementary Mathematics 4-1 (2026)
Concept + Operation Light Elementary Mathematics 4-1 (2026)
Description
Book Introduction
『Concept + Operation Light』 is an elementary school math textbook that strengthens conceptual memory with one-cut concepts and enhances computational skills with calculation techniques.


【Complete Basic Skills】 Includes all units (not only operations, but also shapes, measurements, etc.)
【Strengthening Concept Memory】 Includes one-cut concepts to help you learn concepts easily and enjoyably.
【Strengthening Ability to Calculate】 Includes secrets to elementary equation calculations that will help you develop your numerical sense and speed up your calculations when you memorize them.
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index
1.
large number
① Ten thousand, tens of thousands
② Five-digit number
③ Place value of a five-digit number
④ Hundred thousand, one million, ten million
⑤ Place value of numbers up to ten million
⑥ billion
⑦ Place value of numbers up to the trillionth unit
⑧ Group
⑨ Place value of numbers up to the trillionth unit
⑩ Jump and count
⑪ Comparison of numbers

2.
angle
① Comparison of angle sizes
② Measuring the size of each angle
③ Acute angle, obtuse angle
④ Sum of angles
⑤ Difference in angle
⑥ The sum of the three angles of a triangle
⑦ The sum of the four angles of a square

3.
Multiplication and division
① (hundreds) × (tens)
② (hundreds and tens) × (tens)
③ (three-digit number) × (tens)
④ (three-digit number) × (two-digit number)
⑤ (hundreds and tens)÷(tens)
⑥ (two-digit number)÷(tens)
⑦ (three-digit number)÷(tens)
⑧ (two-digit number)÷(two-digit number)
⑨ (three-digit number)÷(two-digit number) with a single-digit quotient
⑩ The quotient is two digits and the divisor is (three digits)÷(two digits)
⑪ (three-digit number)÷(two-digit number) with a two-digit quotient and a remainder

4.
Movement of plane figures
① Movement of points
② Pushing the plane figure
③ Flipping a plane figure
④ Rotating a plane figure

5.
bar graph
① Bar graph
② Understanding the contents of the bar graph
③ Drawing a bar graph

6.
Find the rules
① Finding patterns in the array of numbers
② Finding rules in the arrangement of shapes
③ Expressing it as an equation using an equal sign
④ Finding rules in calculation formulas

Detailed image
Detailed Image 1

Publisher's Review
By learning with 『Concept + Operation Light』, you can perform calculations quickly and accurately through calculation secrets that help you calculate quickly and accurately, and you can perfect your calculation skills by supplementing any skills you lack with the "Clinic Book" that fills in your skills.
By learning with 『Concept + Operation Light』, you can build a solid foundation in mathematics.
GOODS SPECIFICS
- Date of issue: October 13, 2025
- Page count, weight, size: 256 pages | 704g | 220*300*20mm
- ISBN13: 9791173165924
- ISBN10: 1173165924
- Reference book for use in grades: 4th grade elementary school
- Reference book usage period: 1st semester
- Reference book difficulty level: Easy Reference book difficulty level guide
- KC Certification: Certification Type: Conformity Confirmation

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