These are flashcards that I have made for a small group activity to work on mental math skills (addition and subtraction). I created these for my students that needed a little extra support in their fluency. I have used them in a group setting (oral quiz), student pairs (quizzing each other), and as an individual activity where the students wrote the answer to the corresponding card down. You can print on multi-colored cardstock and laminate it for an instant set of flashcards! There are 42 editable cards in this document. Enjoy!