My Mental Arithmetic for Android – Latest Version & Features

The application was designed for my kid to train the ability of mental arithmetic in 2-4 elementary school classes.
Sure adults could have a try to train their brains as well.
I am sure you will be astonished comparing your first results and results you gain after one month of training.The following features are included into this application:- summarize up 1000- subtraction up to 1000- multiplication up to x100- dividing up to /100- dividing with a rest- mixed samples: 2x3-4÷2; 4x(2+3); (3+7)-(2+3)- combination of these samples in one exercise- shuffle the unknown value place, e.g.
the first summand is unknown: ???
+ 2 = 5- weight, dimension and time unitsI hope you will enjoy using the App.Any feedback to improve the usability, quality and features is welcome!