Build addition and subtraction fluency to 20 with this editable digital math activity! Students use ten frames and drag-and-drop sports balls to practice math facts in 1st grade. Looking for an engaging, editable digital math activity that helps students master addition and subtraction within 20—without worksheets or extra prep? This Addition & Subtraction to 20 Digital Ten Frame Activity gives 1st graders hands-on practice using virtual manipulatives that build fluency, number sense, and co