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# 075 Operations Q&A

### Arithmetic and Algebra

Question | Answer |
---|---|

What is the difference between an expression and an equation? | An equation involves an equal sign, an expression does not |

What does order of operations mean? | It tells us which operation must be done first |

What is the order of operations? | Division -> multiplication -> subtraction -> addition |

Evaluate the expression (20 - 13) x 5 | 7 x 5 = 35; Answer = 35 |

Evaluate the expression n ÷ 2 - 3, when n = 6 | (6 ÷ 2) - 3 = (3) - 3 = 0; Answer = 0 |

Which is an example of an equation: 10 + x or 12 - 3 = x? | 12 - 3 = x. (This is can be read as "The difference between 12 and 3 is x") |

"... more than ..." or "... greater than..." means: | It means to add to a given number, value, symbol or term |

"... less than ..." or "... smaller than..." or "... fewer than ..." means: | It means to subtract from a given number, value, symbol or term |

"... twice as many ..." or "... double..." or "... two times the number of..." means: | It means double or two times the amount |

"... half of ..." or "... half as many as..." means: | It means to divide a value, number, symbol or term by 2 |

"... half of n" or "... half as many as n" means: | It means to divide n by 2 |

Created by:
Mindful_Pumpkin