"Concept + Operation Power" organizes applied concepts into keywords for impactful analysis, and cultivates applied computational skills through step-by-step operation types of "basic, skill, and sentence problems."


[Basic D·R·I·L·L Red/Strong/Yellow/Acid] Master the 'basic operation types' that you must master to achieve accuracy and speed in operations.
[Skill U·P No/Rang/Yeon/San] Raise your operational acumen with 'applied operation types' that require caution and are easy to learn if you know the secret.
[Sentence Problems P·L·U·S Cho/Chok/Yeon/Arithmetic] Complete problem-solving skills with the 'Sentence Problem Operation Types' that frequently appear in the Operations Unit.