Same & Different: Adding Hundreds, Tens & Ones

Look at the two pictures. What do you notice?

A. shows the words 'two hundred fifty-five' and on a number line. A red jump goes from 0 to 200 (+200), a green jump goes from 200 to 250 (+50), and a yellow jump goes from 250 to 255 (+5). B. shows the words '1 hundred + 15 tens + 5 ones; and number pieces. It has 1 red mat, 15 green strips, and 5 yellow units.
  1. What is mathematically the same and different about pictures A and B?
    • 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 and different from pictures A and B.