Solving Unknown Amounts Using Addition and Subtraction Fact Families

The video tutorial explains how to use addition and subtraction fact families to solve equations with unknown values. It demonstrates creating fact families using examples and shows how to solve problems with missing addends or unknown sums. A word problem is also solved using these techniques, emphasizing the importance of understanding related equations in a fact family.

What are the four equations that can be created from the add-ins 17 and 8?

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Describe how to represent fact families in a triangle.

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How can you solve an equation where an add-in is missing?

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Explain how to create a fact family triangle for the equation blank minus 6 equals 38.

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What is the process to find the total number of marshmallows Laura had initially?

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