# Fact family

A fact family is a set of related addition and subtraction facts, or multiplication and division facts.

### addition and subtraction fact family

An addition and subtraction fact family uses two addends and their sum to form basic facts.

Examples: Fact families using different sets of numbers

3, 4, and 7: | 8, 0, and 8: | |

3 + 4 = 7 | 8 + 0 = 8 | |

4 + 3 = 7 | 0 + 8 = 8 | |

7 - 4 = 3 | 8 - 0 = 8 | |

7 - 3 = 4 | 8 - 8 = 0 |

### multiplication and division fact family

A multiplication and division fact family uses two factors and their product to form basic facts.

Examples: Fact families using different sets of numbers

4, 6, and 24: | 5, 0, and 0: | |

4 × 6 = 24 | 5 × 0 = 0 | |

6 × 4 = 24 | 0 × 5 = 0 | |

24 ÷ 6 = 4 | 0 ÷ 5 = 0 | |

24 ÷ 4 = 6 | None (5 ÷ 0 is undefined) |

Also called related facts, related sentences.

See also basic facts, related facts.