Fact Families in Addition and Subtraction

In this math lesson, students learn about fact families, focusing on addition and subtraction. The teacher introduces the concept using two sets of numbers: 5, 7, and 2, followed by 1, 4, and 3. Each set demonstrates how numbers can be combined in different ways to form addition and subtraction facts. The lesson concludes with encouragement for students to practice creating their own fact families.

What is a fact family in mathematics?

• A collection of numbers that are unrelated.

• A group of numbers used for division only.

• A set of numbers used only for multiplication.

• A group of numbers that are related through addition and subtraction.

In the first fact family, what is the result of 5 plus 2?

• 7

• 9

• 6

• 8

Which of the following is an addition fact from the first fact family?

• 5 + 5 = 10

• 7 + 2 = 9

• 5 + 7 = 12

• 2 + 5 = 7

What is the result of 7 minus 2 in the first fact family?

• 4

• 5

• 6

• 3

Which subtraction fact is part of the first fact family?

• 7 - 5 = 2

• 7 - 3 = 4

• 5 - 2 = 3

• 2 - 5 = -3

In the second fact family, what is the result of 1 plus 3?

• 2

• 5

• 3

• 4

Which of the following is an addition fact from the second fact family?

• 3 + 1 = 4

• 4 + 1 = 5

• 1 + 4 = 5

• 3 + 3 = 6

What is the result of 4 minus 1 in the second fact family?

• 1

• 2

• 3

• 4

Which subtraction fact is part of the second fact family?

• 3 - 1 = 2

• 4 - 3 = 1

• 4 - 2 = 2

• 1 - 3 = -2

What is the largest number in the second fact family?

• 3

• 2

• 1

• 4