Basic Facts King!

Basic Facts King! an AWESOME game made for basic fact kings. Theres Addition,Multiplication and subtraction. A fun maths activity to play in your learning time. Today I played a spectacular game,with my friend, Te Harangi. Would you like to learn how to play the game?... I'll take that as a yes!
So what you need is: Cards,two players and... cards! :D
So each player has 5 cards,wait! you cant look at the cards. You chose your maths problem,Addition,Subtraction,Multiplication, then you both flip the cards. Kings,Queens,Jacks and Jokers either become tens or taken out of the game. e.g you chose addition so if we flipped our cards and my card was 5 and your card was 9 the answer would be 14 because 5+9=14. Thankyou for reading, Please give me feedback and feedforward.