2 Digit Addition with Regrouping Activity #1 This resource includes 40 interactive Google slides, 6 printable worksheets, and an Easel Ready Activity for students to practice adding double digit numbers with regrouping. This math center uses the place value strategy of base 10 blocks to practice solving addition problems with 2 digit addends up to 100. The interactive slides allow students to drag moveable base-10 blocks into the tens and ones place to model the addition problem. Studen