"Arithmetic Mechanisms Encyclopedia" Kozo Tsubota Price: ¥2500 You can check the table of contents and sample content in the images. It's very interesting, so please take a look! ^_^ There are some writings, stains, and signs of use, so I'm offering it at a reasonable price to those who understand. Please check the images for examples of writing and stains. [Please read before purchasing m(_ _)m] * The actual product's color may slightly differ due to lighting. * As it is used and stored at home, there may be some scratches that I haven't noticed. * I have a cat. There are no smokers. I am very careful, but there is a possibility of cat hair getting mixed in. Please be careful if you have allergies. * Packaging may use recycled materials. * Depending on the packaging, it may be sent via Rakuraku Mercari Bin or Yuuyu Mercari Bin. Thank you for your understanding. ^_^ In addition, the buyer will be responsible for the return shipping costs. Please understand. #Arithmetic #ElementarySchoolArithmetic #ThinkingSkills