Understanding the inverse relationship between addition and subtraction is essential for developing fluency in young mathematicians. Zoe and RJ explain how three numbers can form fact families that make two addition and two subtraction...

In this video, you will solve for unknown amounts by using addition and subtraction fact families. [3:54]

This lesson explains what fact families are and how to use them to answer related arithmetic facts. It also models how to solve two word problems. [7:54]

In this video, students are introduced to the concept of fact families. Visual models are used to show how one addition fact yields two subtraction facts. They are then presented with some true or false questions and word problems. [8:44]

Teaches strategies for learning the addition and subtraction facts for 12 using a number rainbow. Students are then presented with a subtraction facts drill where they practice along to the video. [6:40]

This video demonstrates how to use a number rainbow to represent the subtraction and addition facts for 11. Students are then presented with a subtraction facts drill where they practice along to the video. [5:46]

This video demonstrates how to use a number rainbow to represent the subtraction and addition facts for 13. Students are then presented with a subtraction facts drill where they practice along to the video. [4:24]