Print collection published by Asahi Printsha Contains 22 sets of problems Problem book published by Sato Publishing Contains 15 sets of problems It is effective to repeatedly practice the answers to the problem book by writing them in a notebook, and then practice writing in the print collection after applying for the certification test. The print collection will be lightly folded in half, with the problem book inserted, and shipped via anonymous Nekopos delivery. Due to copyright issues, the price of abacus teaching materials cannot be lowered ❌. If shipping costs are reduced by combining with items other than teaching materials, the price may be reduced accordingly, but it will not be below the list price. If you are not good at mental calculation, please see below. #Soronyan Abacus Teaching Materials ← You can see all the abacus teaching materials here. Please read the profile carefully❗️carefully❗️carefully❗️, and if you have no questions or need to combine items, please purchase without commenting. Abacus certification practice problem book Brain training Anti-aging Right brain activation Home study Self-study