1. Create a 3 or 4 digit number using base ten blocks. 2. Tap button. 3. Take a of your base ten block number that you built. 4. Tap button. 5. Tap and write and record the number in expanded form. Ex. 200 + 30 + 4 = 234 6. Tap to add to your journal. CHALLENGE: Make two base ten models and add them together.