This download includes printable black and white addition and subtraction flash cards with facts 0+0/0-0 though 12+12/12-12 (plus and minus 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12). There are three different versions of the addition and subtraction flash cards. Choose the horizontal flash cards, vertical flash cards, or the flash cards with related facts all on one page! Print on cardstock or construction paper for extra durability. Answer keys are included so the answer can be printed o