Building Fact Families with Addition and Subtraction

The video introduces the concept of number families and fact families, explaining how three numbers can form two addition and two subtraction sentences. It demonstrates using a house diagram to visualize these relationships. The video includes examples and a game to reinforce understanding, showing how to solve problems by identifying missing numbers in a fact family. The lesson concludes with a recap of the key concepts and encourages students to apply their knowledge in a game.

Explain how addition and subtraction sentences can be created from the same set of numbers.

What is a fact family and how is it represented?

How can you find the missing number in a fact family when given two numbers?

Describe the process of using a number line to solve addition problems.

What steps would you take to solve a problem involving a missing number in a subtraction sentence?

What did you learn about the relationship between addition and subtraction through fact families?

How can you use the concept of fact families to help with math problems in real life?