Three digit regrouping addition math center task cards, 64 vertical algorithm plus sums and 20 word problems for third and fourth grade. All on super cute pet-themed cards that your students will love! Simply print, laminate and pop into math center tubs. No thinking required! Students can either write their answers on the cards in whiteboard markers, or copy the sums into their workbooks, mini whiteboards or paper. These are great as a math rotation, great for extension for chi