Which 3 go together?

Mai used base-ten blocks to find the value of . Then she made a matching diagram.

What did she do in Step 2? What should she do to find the difference? Explain your reasoning.

Step 1

1. Write each expression next to the matching diagram. Then find the value of each difference.

   1. 
      

      

   2. 
      

      

   3. 
      

      

Find the value of each difference. Show your thinking, using drawings, numbers, or words. Try Mai's way for 1 expression.

5. Share how you found the value of 1 expression with your partner. Use the sentence frames to explain your reasoning.

   • “First I . . . .”
   • “Next I . . . .”
   • “Then I . . . .”
   • “Last I . . . .”