A game that competes for the speed of mental calculation of 2 digits
You can play now!
You can expect to improve your learning ability!
Update from time to time
Have fun!
No need to register personal information!
No charge!
A game that competes for the speed of mental calculation of 2 digits
You can play now!
You can expect to improve your learning ability!
Update from time to time
Have fun!
No need to register personal information!
No charge!