**Task Name : **Multiplying and Dividing Negative Number Stories |
**Task Level : **I (Year 8) |

**Semester : **1 |
**Topic :** Directed Numbers |
**VC Strand : **Number and Place Value |

**Web Address : **http://maths.crusoecollege.vic.edu.au/npvI |

**Equipment Needed : **Poster Paper |

**Victorian Curriculum outcome : **Carry out the four operations with rational numbers and integers, using efficient mental and written strategies and appropriate digital technologies |

**Task description : **Students create eight stories that describe multiplication and division of positive and negative numbers. Two should describe the multiplication of positive numbers; two should describe the division of positive numbers; two should describe the multiplication of negative numbers; and two should describe the division of negative numbers. Each story should contain: the written story; a picture accompanying the story; a number line describing the story; and an algorithm describing the story. |

**Assessment options : **Photograph of poster; digital image. |

**Teacher notes : **Money is a good way to describe these processes. If I gain three paypackets of $50 each, the effect on my wealth is +50 x +3 = +150. If I lose two of these paypackets, I lose positive money: +50 x -2 = -150. If I gain three bills for $25 each, I gain negative money: -25 x +3 = -75. However, if I lose two of these bills, I lose negative money which impacts positively on my wealth: -25 x -2 = +50. |