There are 45 cards in this game. It is a fun way to learn to add three numbers to make 21. It involves both addition and subtraction and the WILD card adds an extra element for mental computation.
This game is very motivating and your students will want to play it over and over. I added the WILD card to give it an extra edge for my older students. This game is great for mathematical thinking and you can adjust it to suit the skills the players have by restricting the cards they use.
I have a simpler game called 15 along the same lines.
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