4 pack of math flashcards for helping children of all ages learn addition, subtraction, multiplication, division, and practice for tests and quizzes. Each deck includes 52 cards with 104 problems, for a total of 416 problems to ensure that you never answer the same problem twice in a session. Each card includes the solution to the problem on its backside to keep learning fast and fun. This flashcard set includes two metal rings to easily organize your desk of cards, with each deck featuring hole punches to insert rings easily.