Find the value of each expression mentally.

Find the value of each difference in any way that makes sense to you. Explain or show your reasoning.

1. Jada and Han made drawings to show how they used base-ten blocks to find the value of . 

   Jada's drawing

   

   Han's drawing

   

   How are their drawings alike? How are they different?

2. Here are 3 expressions, followed by 3 diagrams. Write each expression next to the diagram that represents it. Then find the value of each expression.

   1.  

      

   2.  

      

   3.