Printable · fact families
Fact Families Worksheets
Triangles with the three numbers, and lines to write each fact. The harder sheet hides one of the numbers.
Write the family
Find the missing number
Then let them play
In Family House, children open the doors that belong to the family and avoid the impostor. There's a page for every family too, if one keeps slipping.
Questions
Why do some triangles only have two lines?
Those are doubles, like 4, 4 and 8. Swapping two 4s doesn't make a new fact, so there are only two.
What should my child do first?
Find the biggest number. It's the whole, so it's the answer in the additions and the start of the subtractions.
Is Sumtown really free?
Yes. The whole game plays free in your browser, with no signup, no ads and no time limit. All fourteen mini games are in it. An iPhone app is on its way, and you can read what it will add.
An app is on its way
We're building a Sumtown app for iPhone with the parts that need a real app: offline play for car rides, a town map that remembers how far your child got, and a parent report on every fact. Until then, the whole game is free right here.
Coming soon on theApp Store