Looking for a simple, effective way to help your students master function tables using addition and subtraction within 20? This low-prep resource is perfect for reinforcing input/output table skills—both when students are following a rule and when they must find the rule! With both printable and digital versions included, it's easy to meet the needs of every learner in your classroom. Great for math stations, small group work, assessments, and more! ⭐ What’s Included: ✔ 5 printable pages