Mathcopter

Select one of these four mathematical operations: addition, subtraction, division or multiplication. Press and hold the left button of your mouse, so the helicopter began to rise, and release if you want that he was coming down. Below the screen you'll see an example with the mathematical operation that you selected in the beginning. Among the boxes flying past with balloons find the correct answer to this example, and the incident at him. Collect emoticons, they will give you extra points.