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# Math Topic 2

### Variables, Expressions, and Properties

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

Algebraic Expression | A mathematical phrase that has at least one variable and one operation |

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

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

Input / output table | A table of related values |

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

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

Commutative Property of multiplication | The order in which numbers are multiplied does not change the product of the numbers. |

Substitution | To replace a variable with a number |

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

Associative Property of multiplication | The way numbers are grouped does not affect the product |

Order of operation | A set of rules mathematicians use to determine the order in which operations are preformed |

Distributive property | Multiplying a sum (or difference) by a number gives the same results as multiplying each number in the sum (or difference) by the number and adding (or subtracting) the products |

Identity property of addition | Adding zero to a number does not change the number |

Evaluate | To find the value of an expression |

Created by:
SFABGRADE6-9