Students will add and subtract mixed numbers and check their answers using a QR Code reader. The answers are solved, then they use vocabulary from their answers, ie. What is the numerator of your answer? Scan the QR code to see if you are correct. There are 8 task cards. These would be great for stations, a self check for understanding, or a review before a test. YOU MUST HAVE A QR CODE READER ON A DEVICE FOR THIS TO WORK.