This is a set of self-checking subtraction flashcards. After having purchased many sets of flashcards to use in my classroom I decided to create my own. I wanted to make a simple set of flashcards with the problem on the front and the answer on the back. Many times I have had students practice their facts and not know the answer. These cards allow individual or groups students to practice subtraction facts without having to argue over if an answer is wrong or right. The fact pages and corresponding answer pages can be printed or copied 2-sided and then cut out. Each student in my first grade class has their own set of flashcards and practice their facts when they have free time.