This is a collection of our addition worksheets with answer keys. It's a good activity to supplement your lessons on adding multi-digit numbers. You can use these math sheets as a review, homework, quiz, pre-test, assessment, drill, or practice for your students in the 2nd, 3rd, or 4th grades. *** View our ADDITION Bundle to save and get all types of worksheets.The problems included in this packet are: 2-Digit Plus 1-Digit AdditionAdding 2-Digit by 1-Digit With Regrouping 2-Digit Addition No Reg