This is a collection of our triple digit addition without regrouping worksheets with answer keys. It's a good supplement to your lesson on adding numbers. You can use these sheets as a review, quiz, pre test, assessment, drill, homework, or practice for your students in the 2nd, 3rd, or 4th grades. *** View our Addition Bundle to save and get more activities.There are five sets in this product: Aligned Vertical Addition (12 questions each)Color the Correct Answer (2 choices)Missing Addend or Sum