Can you show your understanding of 3 digit subtraction? 1. Click the green button. 2. Read the story problem. 3. Click the tool. 4. Circle the important information in the story. 5. Use the tool to add or subtract. Make sure you show if you regrouped. 6. Show how to check if your answer is reasonable and accurate. 7. Tap the green . 8. Now click the button and tell how you subtracted. Remember to talk about 1's, 10's, and 100's. Tell how you checked your answer. 9. Tap the to save your work. Tap your name.