スピードけいさん

Features スピードけいさん

This is an app that quickly solves addition and subtraction.To prevent children from getting too excited, we have included a function to prevent children from playing too much.Please note that this feature cannot be turned off.- After playing for about 10 minutes, there will be a break of about 5 minutes.- You cannot play from 0 to 3 minutes and from 30 to 33 minutes of every hour.