how does counting cards work

2 to 6 cards = +1. 7 to 9 cards = 0. Aces and tens = -1. Not only must you assign values to the cards, but you must also learn about the running count. The running count is the total card score where it stands in the game. So, if the shown cards were a 6, two 10s, a 2 and a 7, the overall running count would be: -1, -1,+2 and +0 = 0. design cards