Find the value of each expression mentally.

1. Find the value of each sum mentally.

2. Circle any sum you didn't recall right away.

   Write each sum you circled on an index card.

   Use the index cards to build fluency.

• Spin the top spinner to get your total.
• Spin the bottom spinner to get 1 addend.
• Find the unknown addend.
• Write an equation to show how you found the unknown addend.