Help children build foundational math skills with these handy flash cards! This set includes 4 decks of flash cards—numbers 1-100, addition 0-12, subtraction 0-12, and a math war addition and subtraction game. The double-sided cards are made from thick, glossy cardstock and have rounded corners for easy sorting. Each deck includes 56 cards—including 50-55 flash cards, plus various supplemental cards—for a total of 224 cards. Each card measures 3 1/4" x 6 1/4".