# How to Use Fact Family Houses to Teach Your Child First-Grade Math

Understanding fact families (especially those which create number sentences that add up to 10) are a key concept in first-grade math.

A fact family is made up of three numbers. As in any family, the members (number) are related. At least four math facts that can be made with them.

For example, consider 6, 4, and 10. These members of a fact family are related because the first two numbers can be added to get the third.

## Knowing the Tens Facts

Begin by having your child list out the Tens Facts. You and your child can figure out the combination of numbers that add up to 10.

Be sure to list the inverse facts as well—for example:

1 + 9 = 10

and

9 + 1 = 10

## Draw a Fact Family House

You can also draw a fact family house or print one out. All your house needs to have is a roof with three windows and a body with four bay windows.

Write two blank addition problems (____ + ____ = _____) and two blank subtraction problems (____ - ____ = _____) in the bay windows.

## Move in the Fact Family

In the attic windows of your fact family house, ask your child to write the three numbers that make up the family's members. Put the largest number in the top window.

If you begin your Tens Facts with 1 + 9, the numbers in the windows will be 10, 9, and 1.

From there, have your child complete the two addition problems using the list they created. Once they've figured those out, the subtraction problems should be easy.

If you need to prompt your child, trying asking, "If I added 9 to 1 to get 10, what do you think would be left if I took that 9 away again?"