عمليات في الرياضيات

After agreeing to the privacy policy and registering a name of whatever it is to save the obtained results, I choose the process to be learned (addition, subtraction, multiplication, or mixed) by clicking on what I want.
Birds appear dragging endless operations behind them. I think about the answer quickly, write the result, and then press the Attack button
If the result is correct, I answer the other operations, and so on...trying to speed up before the birds reach me, so I lose...a wonderful application that deserves to be installed and used regularly to develop intelligence skills and immediate response....