This is a fun way for your students to practice adding and subtracting mixed numbers with like denominators. Students will move around the room solving problems. Each card has a problem for students to solve. Once they do this and record the answer on their answer sheet they will need to search the room for another card that has that answer on it. Once they find it they will solve the problem that is on that card. It is so much better than a traditional worksheet. The students will have so much fun with the movement that they won't even realize they are doing work! They are actually excited to do the activity. The 16 cards correlate with the fourth grade common core math objective 4.NF.3.C.