Subtract and multiply and add and share - not only taught in school. These simple calculations can be learned in this fun game. Here you'll not only be considered, but at the same time will develop a care that will help you keep track of all the plates, in search of the right one. After all, one of them hid the "X" and by evaluating it, you can safely go in search of him. The main thing you do not accidentally select the wrong "X", and then the correct answer would be offended and leave. While giving a bigger task.