Students can practice solving addition number sentences through the interactive learning exercises and games on this site.

Explore the relationship between addition and subtraction with this lesson. Help students understand that "every subtraction fact has a related addition number sentence, and every addition fact has a related subtraction number...

Students will solve word problems to create their own subtraction number sentences. They will use known addition facts to solve subtraction problems. A detailed lesson plan, worksheet, and pictures/videos of the lesson being modeled are...