A fact family is the 3 numbers that are related and go together to create basic addition and subtraction facts.
For example: 3, 5, 8 are a fact family
3 + 5 = 8 5 + 3 = 8
8 - 5 = 3 8 - 3 = 5
For example: 2, 2, 4 are a fact family
2 + 2 = 4
4 - 2 = 2
Tonight the children got 6 fact triangles. Rather than cut them out, I asked the children to write the facts that go with each fact family represented by a triangle.
There are 6 fact triangles. 3 are doubles facts and the other 3 are not. Fact families for doubles make two facts (an addition and subtraction). All other fact families have four facts (two addition and two subtraction).
When you login to everydaymathonline.com
you can find the Interactive Reference book under the Home Connections section (below). Additionally, you can resource the Family Letter for the unit that was sent home last week on blue paper OR find it under the Home Connections online.