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

How do you find a missing number in an addition equation?

Back

To find a missing number in an addition equation, subtract the known number from the total sum.

Front

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

Back

In a fact family, the numbers used in addition can be rearranged to create subtraction equations, and vice versa.

Front

If 3 + ___ = 7, what is the missing number?

Back

The missing number is 4.

Front

What is the sum of 6 and 7?

Back

The sum of 6 and 7 is 13.

Front

Complete the fact family: 9 + 10 = 19, 10 + 9 = 19, 19 - 9 = 10, ___ - ___ = ___?

Back

19 - 10 = 9.

Front

What is the equation that corresponds to the fact family of 9 + 9 = 18?

Back

The equation is 18 - 9 = 9.

Front

How can you verify that two addition equations have the same sum?

Back

You can verify that two addition equations have the same sum by calculating the total of each equation and comparing the results.

Front

What is the commutative property of addition?

Back

The commutative property of addition states that changing the order of the addends does not change the sum.

Front

If 11 + 9 = 20, what is another way to write this equation?

Back

Another way to write this equation is 9 + 11 = 20.