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# 5th Grade EDM U10/12

### Using Data, Algebra Concepts and Skills, Probability, Ratios and Rates

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

ordered number pair | two numbers, or coordinates, used to locate a point on a coordinate grid |

variable | a letter or other symbol that represents a number |

ratio | a comparison by division of two quantities with the same units |

rate | a comparison by division of two quantities with different units |

pi 3.14 | the ratio of the circumference of a circle to its diameter |

formula | a general rule for finding the value of something |

line graph | a graph in which data points are connected by line segments |

radius | a line segment from the center of a circle (or sphere) to any point on the circle (or sphere) |

diameter | a line segment that passes through the center of a circle or sphere and has endpoints on the circle or sphere |

coordinate | a number used to locate a point on a number line; a point's distance from an origin; one of the numbers in an ordered pair that locates a point on a coordinate grid |

algebraic expression | an expression that contains a variable |

circumference | the distance around a circle; its perimeter |

common factor | a factor of two or more counting numbers |

equal chance/equally likely | having the same probability |

factor tree | a strategy to get the prime factorization of a counting number |

greatest common factor (GCF) | the largest factor that two or more counting numbers have in common |

least common multiple (LCM) | the smallest number that is a multiple of two or more given numbers |

magnitude | 10 times an amount |

multiplication counting principle | a strategy for determining the total number of possible outcomes for two or more separate choices |

prime factorization | a counting number written as a product of prime-number factors |

probability | a number from 0 through 1 giving the likelihood of an event happening |

tree diagram | a strategy used to find all outcomes in a probability situation |