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# ABCTE Math Flashcard

### Flashcards of ABCTE Math exam.

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

Rational Numbers | can be written as a fraction, a/b, where a and b are integers and b can not = 0. They include fractions, repeating decimals and terminating decimals. |

Irational Numbers | Numbers that can not be written as a fraction a/b, where a and b are integers and b can not = 0 Irrational numbers became decimals that do not terminate or repeat. |

whole Numbers | the counting numbers with 0 |

Integers | positive and negative counting numbers including 0 |

Communitive Property | ORDER not important for addition and multiplication. |

Associative Property | GROUPING not important in addition or subtraction |

Identity Property | SELF the number wants to stay the same addition = # plus 0 = # Multiplication = # x 1 = # Multiplication = # x 0 = 0 |

Distributive Property | for any # a, b. c a (b+c) = ab + ac and a(b-c) = ab - ac |

expression | a symbol or combination of symbols that represent a quantity |

prime number | a positive integer not divisible by any positive integer other than itself and the number |

prime # 1-25 | 2,3,5,7,11,13,17,19,23 |

composite numbers | have more than 2 factors, all even numbers are composites |

cool Rules #1 | #1 is neither prime nor composite 1x1=1 only 1 factor and prime #s have 2 factors |

cool Rule #2 | #'s divisible by 2 are even and end in 0 |

cool Rule #3 | sum digits of # if divisible by 3 then the # is divisible by 3 |

cool Rule #4 | final 2 digits of # divisible by 4 then the # is divisible by 4 |

cool Rule #5 | one's place digit is 0 or 5 then the # is divisible by 5 |

Cool Rule #6 | divisible by 6 if divisible by 2 and 3. must be even # for which the sum is divisible by 3 |

cool Rule #7 | no shortcuts just divide # by 7 |

cool Rule #8 | for # greater than 1000. Ends in a 3 digit # divisible by 8. |

Cool Rule #9 | sum of the digits of # must be divisible by 9 |

Cool Rule #10 | divisible by 10 if the digit in one's place is 0 |

prime factorization | process that finds the prime # product of a given composite #. T's and Trees's |