A player shuffles the cards and places them facedown in a stack.  Players take turns taking the two top cards from the stack.  If the sum of the numbers is a number on a player's grid, that player places a penny or counter on that number.  If there is already a counter on that number, the player places another counter on top of it.

The first player to get four counters in a row, column, or diagonal calls out "Bingo."  If, by the time the cards have all been used, no player has gotten four in a row, then the player with more counters on the grid wins.

Game Variation:

If more than two players want to play and no one gets four in a row before all the cards have been used, they shuffle the cards and continue playing, using the deck again.