「2-digit Addition with Carrying 」Math Worksheets is designed for 1st grade students who are practicing 2-digit addition (with carry over) . Digits at one’s place are added first, one 'ten' is carried over to ten’s side. 「2-digit Addition with Carrying 」Math Worksheets (PDF : 4 Books):Book 1 - “1-digit” + “2-digit” (within 30) , 8 pagesBook 2 - “1-digit” + “2-digit” (within 40), 8 pagesBook 3 - “2-digit” + “2-digit” (within 50), 8 pagesBook 4 - “2-digit” + “2-digit” (within 100), 8 pagesTotal 32