1. Tap . 2. Tap your name. 3. Using the write your math problem in the blue and green boxes. 4. Drag the l rods (tens) and @ units (ones) to represent the TOP number on the work mat. 5. Tap and cross out the number of tens and ones represented by the BOTTOM number. **HINT** You may need to swap one I rod (tens) for 10 @ units (ones) to correctly cross out the bottom number. 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. 10. Tap to submit your work.
Provide students index cards with two digit addition problems with regrouping. Students can swap out cards and complete activity multiple times.