This product contains 52 math task cards. The task cards focus on double digit addition with regrouping. Each task card has a QR code for your students to scan and check the answer. I put these on card stock and laminate them so the kids are able to write on them. They go out during math centers. This is just one suggestion on how you can use these in your classroom. Please leave feedback if you enjoy this product! Contact me with any questions or concerns. Don't forget to follow my store!