1.
Mixed calculations of natural numbers

① Calculation of expressions that mix addition and subtraction
② Calculation of expressions that mix multiplication and division
③ Calculation of expressions that mix addition, subtraction, and multiplication
④ Calculation of expressions that mix addition, subtraction, and division
⑤ Calculation of expressions that mix addition, subtraction, multiplication, and division

2.
Divisors and multiples

① Divisor
② Drainage
③ Common divisor, greatest common divisor
④ How to find the greatest common divisor using the multiplication formula
⑤ How to find the greatest common divisor by dividing by the greatest common divisor
⑥ Common multiple, least common multiple
⑦ How to find the least common multiple using the multiplication formula
⑧ How to find the least common multiple by dividing by a common divisor

3.
Correspondence relationship

① Correspondence between two quantities
② Express the correspondence relationship as a formula
③ Find corresponding relationships in real life and express them in equations.

4.
Reduce and common fractions

① Fractions of the same size
② Reduction
③ Indignation
④ Comparison of fraction sizes
⑤ Comparison of the sizes of fractions and decimals

5.
Addition and subtraction of fractions

① Addition of proper fractions whose sum is less than 1
② Addition of proper fractions whose sum is greater than 1
③ Addition of mixed numbers
④ Subtraction of proper fractions
⑤ Subtraction of mixed numbers where fraction parts can be subtracted
⑥ Subtraction of mixed numbers where the fractional parts cannot be subtracted

6.
Perimeter and area of ​​polygons

① Perimeter of a regular polygon
② Perimeter of a square
③ Relationship between 1㎠, 1㎡, and 1㎢
④ Area of ​​the rectangle
⑤ Area of ​​a parallelogram
⑥ Area of ​​a triangle
⑦ Area of ​​a rhombus
⑧ Area of ​​a trapezoid

“Once you grasp the concept, calculations become faster!”

【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.

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.
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