These digital task cards work great on laptops, desktops, tablets, or any other mobile device that has access to the internet. They are self grading and you can monitor student progress over the internet. These no-prep task cards require no paper, no cutting, no laminating, and you don't have to worry about where to store them!40 free cards focused on 2-digit subtraction with regrouping.More about BOOM Learning℠…To use Boom Cards, you must be connected to the Internet. Boom Cards play on modern