Subtraction Fact Fluency - Subtract 1: These digital task cards on the Boom™ Learning website cover subtraction fact fluency for the ones facts / subtract 1 facts (1-1, 2-1, 3-1, etc.). These digital task cards are great for Google Classroom™. They work on a laptop, desktop, Chromebook, tablet, or any other mobile device that can access the internet. They can also be used as a whole group activity using your interactive screens or projectors in class.These cards are self-grading, which gives stu