This app is the official app for "Abacus Classroom 88" that can be used by young children. You can practice flash mental arithmetic and calculation even at home for children attending the “Soroban 88-kun classroom”, which is a Seiha group! Main features: ・One person flash Practice flash mental arithmetic from simple problems. ・Multiplication table master I will practice the multiplication table. Abacus classroom 88-kun App member limited functions: ・Master who becomes 5・10 ❖ Start from the pla