Thank you for viewing. This is a set of answer keys for the Chart-Shiki Basic Mathematics C textbook. Instant purchase is welcome. ・I don't remember using it at all, so the contents are clean and there are no creases. ・Because it's been stored by a private individual, there are minor scratches on the front and back covers (see images 2 and 3), so please refrain from purchasing if you are sensitive to such things. m(_ _)m