Fact Families and Related Equations

This video tutorial teaches how to solve for unknown amounts using addition and subtraction fact families. It explains the concept of fact families, demonstrates how to create equations with given addends, and introduces the fact family triangle. The tutorial also covers solving equations with missing addends and unknown sums, using examples and a word problem to illustrate the process.

What is the main idea behind using addition and subtraction fact families?

• To solve equations with unknown values

• To memorize multiplication tables

• To practice division

• To learn about geometry

If you have the equation 9 + ___ = 22, which of the following is a related subtraction equation?

• 22 - 9 = ___

• 9 - 22 = ___

• 9 + 22 = ___

• 22 + 9 = ___

In a fact family, if one equation is 22 - 9 = 13, what is another related addition equation?

• 9 + 22 = 13

• 13 - 9 = 22

• 22 + 13 = 9

• 13 + 9 = 22

When the sum is unknown, which of the following is a correct approach?

• Ignore the sum and focus on the addends

• Use multiplication to find the sum

• Use a fact family triangle to find the sum

• Guess the sum based on the addends

If you have the equation ___ - 6 = 38, what is a related addition equation?

• 38 + 6 = ___

• 6 - 38 = ___

• 38 - 6 = ___

• 6 + ___ = 38

In the marshmallow problem, what is the unknown value you are solving for?

• The number of marshmallows eaten

• The number of marshmallows left

• The number of friends

• The total number of marshmallows initially

Which equation represents the starting point for solving the marshmallow problem?

• 26 + 7 = ___

• 26 - 7 = ___

• ___ - 26 = 7

• 7 - 26 = ___

What is the total number of marshmallows in the bag initially, according to the word problem?

• 26

• 7

• 33

• 13

How can you verify your solution in a word problem using fact families?

• By checking if the sum of the addends equals the total

• By asking a friend

• By guessing the total

• By using a calculator

What is the benefit of using fact families in solving equations?

• It helps in memorizing equations

• It reduces the number of equations to solve

• It provides multiple ways to verify the solution

• It makes equations more complex