This is a collection of our triple digit addition with regrouping worksheets with answer keys. It has five activity types to help supplement your lessons. You can use these worksheets as a review, homework, quiz, pre-test prep activity, assessment, drill, or practice for your students in the 2nd, 3rd, or 4th grades. *** View our Addition Bundle to save and get other activities.There are five sets in this product: Set 1: Aligned Vertical Addition (12 questions each) Set 2: Color the Correct Answe