Multiplying and Dividing Signed Numbers

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• Multiplying and Dividing Signed Numbers

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Multiplying and Dividing Signed Numbers

• The good news is that the rules for multiplying
  and dividing signed numbers are the same.
• If the signs are the same, the answer is
• If the signs are different, the answer is -

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Same signs

• When you think about it, there is a relationship
  between combining signed numbers with the same
  sign and multiplying or dividing them.
• If youre combining and the signs are the same
  you add ()
• If youre multiplying and the signs are the same
  your answer is positive ()

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Different signs

• When you think about it, there is a relationship
  between combining signed numbers with different
  signs and multiplying or dividing them.
• If youre combining and the signs are different
  you subtract (-)
• If youre multiplying and the signs are different
  your answer is negative (-)

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Sign Clues

• If youre multiplying or dividing, the operation
  is always whatever the problem tells you to do.
  The signs tell you the sign of the answer.
• If youre combining, the signs tell you which
  operation to use. The sign of the answer is
  always the sign of the number with the greatest
  magnitude.

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Multiplying and Dividing Signed Numbers

• Same sign answer positive
• Different signs answer negative.