Same & Different: Base Ten Pieces

Look at the two collections. What do you notice?

A: Yellow base ten pieces represent 25.8 as 2 mats, 5 rods, and 8 units. What is the value of each mat? B: Base ten pieces represent an unknown number as 2 yellow mats, 4 green rods, and 18 red units. Each mat = 1.
  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. Use base ten pieces to make a third picture that represents a number. Explain how your picture is the same as pictures A and B, and how it is different.