2 digit addition games are a favorite and provide students with fun practice and an opportunity to share their thinking and check their understanding as they explain their thinking to their peers. What is half? This new game was a hit in the classroom. Flip a card, draw a picture, find half, make an accurate statement about your picture. i.e. Flip 7, student would say 3 1/2 is half of 7 or Half of 7 is 3 1/2.