Are you looking for a fun way to practice addition with regrouping with your class? These Troll themed task cards can be used for several activities: Math centers, small group instruction, math games (such as Math Jeopardy and Around the World), math lessons, and much more! Students can either use the recording sheet included or write right on the laminated task card with a dry erase marker. These task cards meet the CCSS, standard 3.NBT.2. They can also be used to differentiate instruction for low and high level students in 2nd and 4th grades as well. There are 28 cards included. Please check out the preview.