Cards from 2 to 10 have their face value.The number of decks might be different in various version of the game, but one to eight decks are generally used. Blackjack is played with standard decks of French playing cards. Make sure to study Blackjack rules before playingīlackjack is a relatively simple game, but it’s still good to learn more about it and study the rules before playing, even if only for fun.