Same & Different: Adding Hundreds, Tens & Ones

Look at the two pictures. What do you notice?

A: Three hundred forty-five. Starting at 0 on a number line, this is shown as a red jump +300, then a green jump +40, and a yellow jump +5. B: 2 hundreds + 14 tens + 5 ones. This is shown with number pieces: 2 red mats, 14 green strips, and 5 units.
  1. How are pictures A and B mathematically the same, and how are they different?
    • A and B are the same because …
    • A and B are different because …
  2. Make a third picture to represent a 3-digit number. Explain how your picture is the same as pictures A and B, and how it is different.