"Christmas Integer Addition" Game

You go to an unusual, even one might say, fairy-tale school. In this game you will be taught interesting things. And what is unusual about it is that Santa Clauses from all over the world are studying here. They try to keep up with modern trends and keep up with the times. They know a lot of science and it's an important skill, because they need to take it into account in their work. In the game Christmas Integer Addition you will be able to attend a math class with them. You'll see a mathematical equation on the screen in front of you, with a question mark after the equal sign. At the bottom there will be several Ded Morozes running around with answers, you will have to choose the right one. Quickly solve all the equations in your mind, find the resulting number in those numbers and once you find it, click and get points for the correct answer.