To complete the new online game Subtraction: Bird Image Uncover, your knowledge of such science as mathematics will be useful to you. A picture will be visible on the screen in front of you. Its surface will be covered with tiles on each of which you will see a mathematical subtraction equation. Under the picture on the panel you will see balls with numbers printed on their surface. You will need to carefully examine the game to solve mathematical equations. Using your mouse, you will have to drag the ball with the corresponding answer onto the tile with the equation you solved. If your answer is given correctly, then this tile will disappear from the playing field and you will receive points for this. So gradually, in the game Subtraction: Bird Image Uncover, you will clear the field of tiles and see a picture with the image of a bird.
