There are 435 cards, cut and laminate them, and use them in your classroom! My students do one card per day. I have used them for many years. There are double-digit all the way through four-digit addition with and without carrying, double-digit all the way through four-digit subtraction with and without borrowing, multiplication by one number, all the way through four number, and division of a two digit number divided by a one digit number all the way through division of the four digit number di