For only around $3 you really can’t go wrong.  These are double sided with the answers on the top left part of the card (on the other side of the equation). Not meant to teach how to do addition, but rather to reinforce addition facts. Great size for little hands. I liked the random-ness of the equations, as it helps keep kids on their toes.  Not much negative to say about it other than the paper quality. I wish it was thicker. After using the cards a few times, the corners start to curl and cards separate. Other than that these are amazing for giving your kids some extra math practice, I highly recommend.