1. Tap . 2. Tap your name. 3. Using the write your math problem in the blue and green boxes. 4. Drag the l (tens) and @ (ones) to represent each number on the work mat. 5. Tap and circle 10 balls to represent an additional group of ten. 6. Count all groups of ten and write number in tens column on your work mat. 7. Count all ones and write number in ones column on your work mat. 8. Write your answer in the blue box. 9. Tap to explain how you got your answer.
Provide students index cards with two digit addition problems with regrouping. Students can swap out cards and complete activity multiple times.