* About "a master of area one"
This application is the application that can master the problem of an area made questions for by junior high school examination well smoothly. I can learn it while making step-up from an actual problem to the issue of acquisition of the technique necessary to solve it.
I cover the problem of the area using a rectangle and the square in "the masters of area one".
* Characteristic
● The junior high school examination who wants to master the problem of the area can use it.
● Because I subdivide it every pattern and am made questions, I can practice without unreasonableness repeatedly.
● I can easily confirm it where the expression was wrong on the way because it is displayed.