Show how to subtract from 100 in your math journal. 1. Tap the add button. 2. Take a photo of your math journal page. 3. Use the drawing tool to add any details to your work. 4. Tap the mic and explain how you solved the problem. OR 2. Take a video and explain the problem as you record. Be sure the camera is looking at your math work while you explain. 5. Add to your journal.