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# Math Topic 2

### Variables, Expressions, and Properties

Term | Definition |
---|---|

Evaluate | To find the value of an expression |

Identity Property of Addition | Adding zero to a number does not change the number |

Identity Property of Multiplication | The product of a number and one is that number |

Associative Property of Multiplication | The way numbers are grouped doe not affect the product |

Input/ Output Table | A table of related values |

Distributive Property | Multiplying a sum (or difference) by a number gives the same result as multiplying each number in the sum ( or difference) by the number and adding (or subtraction) the products |

Order of Operations | Set of rules mathematicians use to determine the order in which operations are performed |

Substitution | To replace a variable with a number |

Commutative Property of Multipication | the ordering which numbers are multiplied does not change the product of numbers |

Variable | A quantity that can change at vary, often represented with a letter |

Commutative Property of Addition | The order in which numbers are added does not change the sum of the numbers |

Coefficient | The number that is multiplied by a variable in a algebraic expression Ex: for 6x + 5, the coefficient is 6 |

Associative property of Addition | The way numbers are grouped does not affect the sum |

Algebraic expression | A mathematical phrase that has a least one variable and one operation |

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SFABGRADE6-7