These basic addition cards are great for grades K-3. K and 1 they are great for a learning tool and 2 and 3 they should be used for review. As an added bonus page five has blank slots for you to add your own problems that you want to focus on. Great to send home to practice with parents. Flashcards do not have anything over 20s.
You can also make double copies of these and use them in math centers. Use the blank page to provide the answers and students math the problem with the answer.