Fact Family

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

How do you identify the numbers in a fact family?

Back

The numbers in a fact family are the same for all related equations, typically consisting of two addends and a sum (or two factors and a product).

Front

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

Back

In a fact family, addition and subtraction are inverse operations. If you know two numbers that add up to a sum, you can also find the differences between those numbers.

Front

What is the sum of 5 and 3?

Back

The sum of 5 and 3 is 8.

Front

If 3 + 5 = 8, what is another way to express this equation?

Back

Another way to express this equation is 5 + 3 = 8.

Front

What is the missing number in the equation 3 + __ = 9?

Back

The missing number is 6.

Front

How can you find the missing number in a fact family?

Back

You can find the missing number by using the known numbers and applying the operations of addition or subtraction.

Front

What is the equation that represents the subtraction of 8 and 5?

Back

The equation is 8 - 5 = 3.

Front

What is the relationship between the numbers 12, 9, and 3 in a fact family?

Back

In this fact family, 12 is the sum of 9 and 3, and 9 and 3 are the addends.

Front

How do you write a subtraction sentence from a fact family?

Back

To write a subtraction sentence, take the sum and subtract one of the addends to find the other addend.