① 2021 Standard Mathematics Exercises I•II•A•B 　Exam Edition ② Revised Edition Original Standard Mathematics Exercises II 　Exam Edition Edited by the Sūken Shuppan Editorial Department Answers and brief solutions are included at the end of the booklet, but there is no separate answer explanation booklet. There are writings, stains, and tears, and the condition is not good. Please understand that this is a used item and has been stored at home before purchasing. Please understand that we will use simple packaging and recycled packaging materials. Instant purchase is welcome. G