Looking for a fun interactive teaching idea for adding and subtracting 3 digit numbers? Well look no further as 3 Digit Addition and Subtraction with Regrouping Game Puzzles, for CCSS 3.NBT.2, will serve as an exciting lesson plan for 3rd grade elementary school classrooms. This is a great resource to incorporate into your unit as a guided math center rotation, review exercise, small group work, morning work, remediation, intervention or rti. It can be also used as a quiz, drill, test, or assess