Find the value of each expression mentally.

Lin, Han, and Kiran find the value of .

Lin thinks about .

Han thinks about .

Kiran thinks about .

Explain how each student’s method works.
Show your thinking using drawings, numbers, or words.

• Pick a card.
• Each partner finds the value on their own.
• Each partner gives a signal when they are ready to explain their thinking.
• Each partner shares their thinking.
• Each partner writes the equation to show the sum.

Choose your favorite equation.
Show how you found the value using drawings, numbers, or words.