Complete the equation by crossing out the items to show subtraction. 1. Tap the add button. 2. Read the equation. Tap the drawing tool and draw an X on each item you need to subtract. 3. Using the drawing tool again, complete the number sentence. 4. Tap the record button and explain your thinking. For example: Mary had 4 dolls and she took 1 doll to school so I crossed those out. Now she has 3 dolls. 5. Tap the check to add to your journal.