Arithmetic Operations with Negative and Positive Numbers Review

Adding Real Numbers:

Positive + Positive = Positive | 5 + 3 = 8 |

Negative + Negative = Negative | (- 6) + (- 3) = - 9 |

Sum of a negative and a positive number Keep the sign of the larger number and subtract |
(- 6) + 3 = -3 9 + (-12) = - 3 (- 5) + 7 = 2 4 + ( -2) = 2. |

Subtracting Real Numbers:

Negative - Positive = Negative (same as adding two negative numbers) | (- 8) - 3 = -8 + (-3) = -11 |

Positive - Negative = Positive + Positive = Positive | 4 - (-3) = 4 + 3 = 7 |

Negative - Negative = Negative + Positive = Keep the sign of the larger number and subtract |
(-7) - (-5) = ( -7) + 5 = -2 (-5) - ( -7) = (-5) + 7 = 2 |

Multiplying Real Numbers:

Positive x Positive = Positive | 3 x 4 = 12 |

Negative x Negative = Positive | (-3) x (-5) = 15 |

Negative x Positive = Negative | (-3) x 2 = -6 |

Positive x Negative = Negative | 3 x (-2) = -6 |

Dividing Real Numbers:

Positive ÷ Positive = Positive | 18 ÷ 3 = 6 |

Negative ÷ Negative = Positive | (-18) ÷ (-3) = 6 |

Negative ÷ Positive = Negative | (-18) ÷ 3 = -6 |

Positive ÷ Negative = Negative | 18 ÷ (-3) = -6. |