Are you practicing mental math skills? Swipe! is a great game to use with your students to practice those mental math skills. This version has subtraction facts from 20.
It's easy to play the game! Students will make a stack of the addition doubles and near doubles equations facing down and spread all the answers out so everyone can reach them. They will take turns turning over an equation. Using their mental math skills they will solve the problems and try to be the first to swipe the correct answer before everyone else. The player with the most swiped cards wins.
These subtraction cards could also be used as a matching activity.