I created these worksheets when I was in a long term sub assignment in 2nd grade. There are six 2 digit addition with regrouping worksheets. There is a space next to each problem where the children are asked to check their answers using the inverse operation (subtraction). I used these worksheets as morning work while taking the attendance and lunch count. I also used these worksheets for homework. This year, I brought them to a 3rd grade assignment. These worksheets ended up being a good review assignment for the 3rd graders.
Below are links to some of my other items that might interest you. Thanks for looking!
2 Digit Subtraction With Regrouping Math Worksheets / Check With Inverse Operation
Addition and Subtraction Review With Regrouping Worksheets
Addition & Subtraction Math Puzzles / Magic Squares / Seasonal Math Worksheets
Math Cube Addition / Addition With Regrouping Worksheets / Math Centers Activity
Greater Than, Less Than, Equals / Math Worksheet / Dog Theme
Mopsy's Odd & Even Numbers Mazes / 2 Digit Odd and Even Numbers Worksheets