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# Math topic 2

### Variables, Expressions and Properties

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

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 preformed |

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 effect the product |

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

Substitution | To replace a variable with a number |

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. |

Coefficient | The number that is multiplied by a variable in an algebraic expression |

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

Commutative property of addition | The order in which numbers are added does not change the sum of the numbers |

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

Input and output table | A table of related values. |

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

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

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