+/- Fact Families

Front

What is a fact family in mathematics?

Back

A fact family is a group of related addition and subtraction or multiplication and division facts that use the same numbers.

Tags

CCSS.4.NBT.B.6

Front

How do you identify the missing number in a fact family?

Back

To identify the missing number in a fact family, you can use the known facts to perform the necessary operations (addition or subtraction) to find the unknown.

Tags

CCSS.1.OA.C.6

CCSS.2.OA.B.2

Front

What is the relationship between addition and subtraction in a fact family?

Back

In a fact family, addition and subtraction are inverse operations; knowing one allows you to find the other.

Tags

CCSS.2.NBT.B.5

Front

What is the relationship between multiplication and division in a fact family?

Back

In a fact family, multiplication and division are inverse operations; knowing one allows you to find the other.

Tags

CCSS.4.NBT.B.6

Front

If 9 + 1 = 10, what are the related subtraction facts?

Back

The related subtraction facts are 10 - 1 = 9 and 10 - 9 = 1.

Tags

CCSS.2.NBT.B.5

Front

How can you complete a fact family if given one addition fact?

Back

You can complete a fact family by using the sum and the addends to create the related subtraction facts.

Tags

CCSS.2.NBT.B.5

Front

What is the sum of 9 and 9?

Back

The sum of 9 and 9 is 18.

Tags

CCSS.2.OA.C.3

Front

If you know that 7 + 7 = 14, what is the related subtraction fact?

Back

The related subtraction fact is 14 - 7 = 7.

Tags

CCSS.2.NBT.B.5

Front

What is the missing number in the equation 9 + ______ = 18?

Back

The missing number is 9.

Tags

CCSS.1.OA.A.1

Front

How do you find the missing addition fact in a fact family?

Back

You can find the missing addition fact by using the known sum and one of the addends.

Tags

CCSS.2.OA.A.1