Find the value of each expression mentally.

Write an addition and a subtraction equation to match the connecting cubes. 

1.  

   

2.  

   

3.  

   

4.  

   

5.  

   

Find the number that makes each equation true.
Explain to your partner how you found it.

Color the differences you know.

Write each difference that isn’t colored on an index card.

Write an addition equation on the card that can help you find the value of the difference.