Cut 3X5 cards in half. Divide equally so both players have 50 cards. Write integers from 0 through 20 on each set of cards (remember to use positive and negative numbers).
Shuffle both decks “Face off”. Player 1 should lay down the top 2 cards from his deck face up. Player 1 adds, subtracts, multiplies or divides (this direction should be given before the start of the game)the 2 cards, paying attention to positive and negative signs. Player 2 should do the same with his 2 cards. Compare answers. The player with the highest answer keeps all 4 cards (in a separate pile)
Continue playing until all integer cards are used. The player with the most cards wins.
from:
http://www.mathfilefoldergames.com/face-off-an-integer-card-game/?awt_l=PHLm6&awt_m=3wmDkHFd.ecjRO.