Fact Families

Front

What is a fact family?

Back

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

Front

How many numbers are typically in a fact family?

Back

A fact family typically consists of three numbers.

Front

Given the numbers 2, 3, and 5, what are the addition and subtraction sentences in the fact family?

Back

Addition: 2 + 3 = 5 and 3 + 2 = 5; Subtraction: 5 - 2 = 3 and 5 - 3 = 2.

Front

Which number sentence does not belong in the fact family: 5 + 3 = 8, 8 - 5 = 3, 3 + 5 = 8, or 5 - 3 = 4?

Back

5 - 3 = 4 does not belong in the fact family.

Front

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

Back

Addition and subtraction are inverse operations; the sum can be used to create subtraction sentences.

Front

If 6 - 2 = 4, what is the corresponding addition sentence?

Back

The corresponding addition sentence is 2 + 4 = 6.

Front

Complete the fact family: 4 + 5 = 9, 5 + 4 = 9, ____.

Back

9 - 4 = 5.

Front

What is the addition sentence for the fact family that includes the numbers 7, 2, and 9?

Back

The addition sentences are 7 + 2 = 9 and 2 + 7 = 9.

Front

How can you identify a number sentence that does not belong to a fact family?

Back

A number sentence that does not use the same three numbers as the others in the family does not belong.

Front

What is the subtraction sentence for the fact family that includes 10, 3, and 7?

Back

The subtraction sentences are 10 - 3 = 7 and 10 - 7 = 3.