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# Math Topic 2

### Variable, Expressions, and Properties

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

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

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

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 subtracting) the products |

Evaluate | To find the value of an expression |

Order of operations | a set of rules mathematicians use to determine the order in which operations are performed |

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

Substitution | To replace a variable with a number |

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 |

Input/output table | A table of related values |

Coefficient | The number that is multiplied by a variable in algebraic expression Example: 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 at least one variable and one operation |

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

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SFABGRADE6-15