Let’s learn the multiplication method called 'Kuku'. This is the secret why Japanese guys have a good track record of mathematics. It's important to keep trying on the Kuku, so this app is for you.
You can choose several rows called 'Dan' as you like. Have fun with Kuku!
by D####:
This has really helped my son Alot! The new update made the app not laggy anymore! Thank you! XD