Big Idea:No solving required! Children who understand why a number remains the same when added to zero will not need to memorize each combination individually. Also, fluency can increase by practicing adding 1 or 2 to a number.
Big Idea:Addition and subtraction facts are related, and my First Graders need more practice in using properties of operations to make decisions about equations. This lesson has them decide which operation is being completed to make the equation true.