This file contains worksheets that focus on 2-digit addition and 2-digit subtraction. Some require regrouping. Others do not. That information can be found at the top of each 2-digit addition/subtraction worksheet. Worksheets include horizontal problems, vertical problems, and word problems. I have also included some mixed review problems (telling time, counting coins, ordinal numbers, basic addition and subtraction, writing your own word problems to go with an equation, and 3D shapes). I use these worksheets with my second graders.