Math apps for kids are a fun way to learn subtraction and addition facts. Miner Birds Addition and Subtraction is the best app for kids. It's one of the best apps because kids can practice addition and subtraction in a fun way for hours! Make this game into a center, free choice, or use it when gameschooling math. Perfect for 2nd grade, 3rd grade, and 4th grade. All the miner birds apps are great. I made a video tutorial and review below.