Directed Numbers

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Rules for multiplication

  • +x+=+
    • A positive by a positive is a positive
      • Eg 3x5=15
  • +x-=-
    • A positive by a negative is a negative
      • Eg 3x-5=-15
  • -x+=-
    • A negative by a positive is a negative
      • -3x5=-15
  • -x-=+
    • A negative by a negative is a positive
      • -3x-5=15
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