If you have an Osmo in your classroom, this is a set of fours facts. This works with Osmo Words and the students answer with words (i.e. one, two) rather than digits. Once you download the images, you will upload to https://my.playosmo.com/words/browse/myalbums. You will edit the slides, entering the answers and selecting the difficulty you wish to assign to each problem. You will then be able to download to your iPad.
Students can work alone or in small groups to solve the problems. If you don't have an Osmo for your iPad, check it out. It is very engaging and a whole new way for students to interact with technology.