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# Math Unit 1

### Number Theory Vocabulary Words

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

Composite Number | A counting number greater than one that has more than two factors. For example, 4 is a composite number because it has three factors: 1, 2, and 4. |

Divisible by | If the larger of two counting numbers can be divided by the smaller with no remainder, then the larger is divisible by the smaller. For example, 28 is divisible by 7 because 28/7 = 4 with no remainder. |

Exponent | A small raised number used in exponential notation to tell how many times the base is used as a factor. Example: 52 exponent 52 = 5 * 5 = 25 103 exponent 103 = 10 * 10 * 10 = 1,000 |

Factor | One of two or more numbers that are multiplied to give a product. 3 * 5 = 15 15 * 1 = 15 Factors Product Factors Product |

Factor Rainbow | A way to show factor pairs in a list of all the factors of a number. A factor rainbow can tie used to check whether a list of factors is correct.Factor rainbow for 16: 1 2 4 8 16 |

Number Model | A number sentence expression that models a number story or situation. For example, a number model for the array shown below is 4 * 3 = 12 |

Prime Factorization | A whole number that has exactly two factors: itself and 1. For example, 5 is a prime number because its only factors are 5 and 1. |

Prime Number | A whole number that has exactly two factors: itself and 1. For example, 5 is a prime number because its only factors are 5 and 1. |

Product | The result of multiplying two or more numbers, called factors. For example, in 4 * 3 = 12, the product is 12. |

Rectangular Array | An arrangement of objects in rows and columns that form a rectangle. All rows have the same number of objects, and all columns have the same number of objects. |

Square number | A number that is the product of a counting number multiplied by itself. For example 25 is a square number, because 25 = 5 * 5. |

Created by:
mrsthompson