Fact Families

Front

What is a fact family?

Back

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

Front

Given the numbers 6, 7, and 13, write all the equations in the fact family.

Back

The equations are: 6 + 7 = 13, 7 + 6 = 13, 13 - 6 = 7, 13 - 7 = 6.

Front

Identify the equation that does NOT belong to the fact family of 1, 7, and 6.

Back

7 - 3 = 4 does NOT belong to the fact family of 1, 7, and 6.

Front

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

Back

Addition and subtraction are inverse operations; the sum can be subtracted to find the original numbers.

Front

Write the missing equation for the fact family that includes 8 + 2 = 10, 10 - 2 = 8, and 10 - 8 = 2.

Back

The missing equation is 2 + 8 = 10.

Front

How do you determine if a number sentence is part of a fact family?

Back

A number sentence is part of a fact family if it can be formed using the same set of numbers in addition or subtraction.

Front

What are the four equations in a fact family of the numbers 14, 7, and 7?

Back

The equations are: 14 - 7 = 7, 7 + 7 = 14, 7 = 14 - 7, and 14 = 7 + 7.

Front

Explain how to find a missing number in a fact family.

Back

To find a missing number, use the known numbers and the relationships of addition and subtraction to solve for the unknown.

Front

What is the sum of 6 and 7?

Back

The sum of 6 and 7 is 13.

Front

If you know that 10 - 2 = 8, what is the related addition sentence?

Back

The related addition sentence is 2 + 8 = 10.