Printable fact family worksheets have been collected in high resolution for you to print. Fact families are 3 numbers that are related, just like how people in a family are related. Use these fact family exercises to help your children understand that numbers in a fact family are related and how they work. To make children understand the fact family worksheet easier, compare it to how a real family works out. These 3 numbers make a set of related Math facts. Check out these printable fact family worksheets for first grade provided below!