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# Arithmetic

### math review

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

Even # | Are divisible by 2 |

Odd # | are not divisible by 2 and ALWAYS have a remainder |

Digits | there are 10 digits, in which you can make any # out of |

Prime # | #'s only divisible by itself and 1 |

Absolute value | distance between 0 and that # (always positive) |

Variables/Coefficient | letters in a equation, the coefficient are the #(s) next to a letter |

# divisible by 2 | any even # is divisible by 2 |

# divisible by 3 | sum of digits can be divisible by 3, then it is divisible by 3 |

# divisible by 4 | if the tens and ones digits are divisible by 4 |

#divisible by 5 | last digit is either a 5 or a 0 |

divisible by 6 | last digits are factors of 6 (2&3) |

divisible by 8 | if the last 3 digits are divisible by 8 |

divisible by 9 | if the last digits add up to 9 then it is divisible by 9 |

= | equals sign |

≠ | slash in between the equals sign--> inequality |

> | greater than |

less than | |

≥ | greater than or equal to |

≤ | less than or equal to |

( ) | parenthesis--> calculate whats inside those parenthesis first |

[ ] | brackets --> calculate whats in the brackets first |

+ | plus sign meaning addition between to numbers or terms |

± | calculate both plus and minus operation |

minus-plus (doesnt exist) | calculate both minus and plus operation |

* | multiplication |

x | times sign meaning multiplication |

• | meaning multiplication |

÷ | means to divide |

/ | means to divide |

exponents | multiplying a number by itself by a # of times |

multiplying exponents | add the exponents |

dividing exponents | subtract exponents |

negative exponents | reciprocal of that exponent |

fractional powers | #above the line is most like a real exponent 9 1/2 the two would become the radical of 9 |

power to a power | multiply exponents |

zero power | always equal 1 |

first power | always equals that number |

Created by:
13yesca1