Number System

Natural Numbers "N" | Numbers we use for counting things are called Natural Numbers |

Whole Numbers "W" | Natural Numbers With "0" are called Whole Numbers |

Integers "Z" | Whole Numbers together with Nagetive numbers are called Integers |

Rational Numbers"Q" | A Number that can be made by dividing two Integers |

Irrational Number | A Number that cannot be made by dividing two integers (Integers have no factors) |

Real Numbers (R) | Real numbers consist of the natural numbers, whole numbers, integers, rational, and irrational numbers. |

Decimal |
"Decimal number" is often used to mean a number that uses a decimal point followed by digits that show a value smaller than one. Example: 45.6 (forty-five point six) is a decimal number. |

Properties

Closure property | Commutative property | Associative property |

Role of "0" | Role of "1" | Extense of Inverse |