This is a collection of our 4 digit addition with regrouping worksheets with answer keys. You can use these math sheets as a review, quiz, pre test, drill, assessment, homework, or practice for your students in the 3rd or 4th grades. *** View our Addition Bundle to save and get all worksheets.There are five sets in this product: Aligned Vertical Addition Color the Correct Answer (2 Choices) Find the Missing Addend or Sum, Show Solution Fill in the Blanks, Find the Sum Add 3 Numbers, Show Solutio