『Let's Count!HD』can remember addition and the subtraction while playing.
For four years old from three years old
The addition subtraction can happily learn the moving item to the child only by counting the number touching.

Especially, it is quite difficult for the child to understand the thing "A certain one is lost" to the subtraction.
It is necessary to teach the pulled number(disappearing number) well.

The number decreases in eating food, and it comes to be able visually to understand the subtraction from showing the number pulled so that the number may decrease in fishing plainly.

There is no incorrect answer in this application program.
It is time when stop by the child doesn't understand when making a mistake.
Because the moving item is answered correctly only by touching without fail, the success experience can be obtained while learning while playing.