Math Cross Search 9x9

You're the best student in the class, and your math skills so much surprise your teachers that they are willing to give you a more difficult task. You're certainly happy with the attention to you, and of course proud of that, but you know how much to diligence that would know all this. In the game you will be interested to check not only the addition of numbers, but also that it should be done quickly and without errors. Try it.