Three Digit Addition And Subtraction Worksheets | TpT This packet includes 20 worksheets (plus Google Slides™) for students to practice 3 Digit Addition and Subtraction WITH REGROUPING. Each worksheets has 15 problems.This packet also includes a digital format (Google Slides™).In order to develop mastery in 3-digit addition and subtraction, children ne Subjects: Math, Arithmetic, Basic Operations