Once you learn the algorithms for doing multidigit subtraction, then it might be difficult to remember why it’s hard to learn. If you’re teaching math for elementary teachers, this video might help your students to see why this is so hard for elementary students to learn the subtraction algorithm (or any other algorithm for that matter).

Dr. Maria Andersen has spent most of her career teaching, writing curriculum, and developing digital products for learning. Recently she returned to the classroom, having new teaching adventures in K-12 middle and high school.