You need a bingo card to play. Click the "Need a BINGO card?" pictue and the computer will open a new window for you and make one there. Print the card from that window if you want to use it or press the "Make a new card" button in that window until you get a card you want to print and use.
To start the game press the "Start Bingo" button. When you start the game a problem will be randomly generated. It will be numbered from 1 - 25. Figure out the answer to the problem and write the answer in the box that has the same number as the problem. For example, if problem 16 comes up, figure out the answer and write it in box 16. When you have a row, column, or diagonal of 5 correct answers you win. There may be more than one winner for any game.