4-Step Process I + A, II + B With Answer Explanations - New Curriculum #Books #4-StepProcess #Math #MathIA #MathIIB #NewCurriculum #ExamPrep #PracticeProblems #UniversityEntranceExam This is a set of "4-Step Process Math I + A" and "II + B" from Kenkyu Publishing! The answer explanation booklets are also included. There are some writings here and there, but the answers are not written. There are also some folds and minor tears, but I think it's usable without any problems! I'd be happy if you buy them as a set, but If you want to buy them separately, please comment! Shipping will be via Rakuraku Mercari Delivery, and I will pack them carefully. Thank you!