There are 30 addition and subtraction Boom Learning word problem Task Cards. These cards provide an engaging way for students to solve addition and subtraction word problems. The answers are all within 30. These digital task cards could be great on a laptop, desktop, Chromebook, tablet, or any other mobile device that can access the internet. They can even be used on your Smart Board. They are self-grading and allow you to track student progress. There is no printing, laminating or storage.