This is a collection of mixed two digit addition and subtraction with, without regrouping worksheets. You can use these math sheets as a review, homework, quiz, pre-test, drill, assessment, or practice for your students in the 2nd or 3rd grades. It contains good activities to supplement your lesson on adding and subtracting double digit numbers, including across zeros. *** View our ADDITION AND SUBTRACTION Bundle to save and get more activities. 2-Digit Addition With Regrouping Aligned Numbers (