7, 5, 12
7 + 5 = 12
5 + 7 = 12
12 - 5 = 7
12 - 7 = 5
6, 1, 7
6 + 1 = 7
1 + 6 = 7
7 - 1 = 6
7 - 6 = 1
NOTE: Explain that a fact family is a set of three numbers like the examples
shown on this page. Have the student write out the equations for the
following fact families as practice: (3,4,7), (8,1,9), and (2,3,5). If the
student has difficulty, guide the student through these practice examples
and create a couple more examples for the student. Explain that a fact
family always has two addition statements and two subtraction statements.
Sometimes a fact family will contain duplicate numbers like this example:
(2,2,4). Fact families are so important that the next assignment will also
deal with them.