Fact Families Worksheet Generator
Number triangles with all four related addition and subtraction facts. Sums to 10 or 20. Free PDF with answer key.
Customize
Sums To
How Many Families
Steer the Families
Set the two parts — the whole and all four facts follow.
- #14, 4, 8
- #25, 1, 6
- #31, 6, 7
- #47, 3, 10
Worksheet Title
Options
Paper
Every shuffle deals a brand-new worksheet — free and unlimited, answer key included.
Three numbers, four facts
A fact family is three numbers that live together — like 3, 4, and 7 — and the four facts they make: two additions and two subtractions. Seeing all four on one triangle is how children discover that subtraction undoes addition, the insight behind fluent mental math.
Each card draws the family triangle with the whole on top and the parts below, then asks for all four facts. Steer any card to the exact numbers you want to drill, choose sums to 10 or 20, and shuffle for endless fresh families — the answer key fills every box in green.
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