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Math Help - What are the rules for operations involving negatives and positives etc?

  1. #1
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    What are the rules for operations involving negatives and positives etc?

    Would someone be kind enough to tell me what the rules are for operations involving negative numbers?

    For instance is it correct that adding two negatives makes a positve?

    Thanks
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  2. #2
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    Quote Originally Posted by Layman View Post
    Would someone be kind enough to tell me what the rules are for operations involving negative numbers?

    For instance is it correct that adding two negatives makes a positve? no

    Thanks
    go to the link ...

    Amby's Math Resources - Integers: Operations with Signed Numbers
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  3. #3
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    The confusion arrises when you hear at school (by a teacher not thinking about how students interpret their info) that two negatives make a positive (bad teacher)

    Now that sounds fine on the surface because -2 x -6 = + 12.

    But students then switch off their brains and think

    -4 - 6 = + 10 : here you have to ignore rules of signs and add up : lose 4 then lose 6 - i have lost 10 (-10)

    Put simply: WHEN multiplying or dividing
    Signs the same -> positive answer
    Signs different -> negative answer

    WHEN adding or taking
    (when 2 signs appear together, if the same sign make into a + other wise make into a -)
    EG: 2 - -4 = 2 + 4 = 6 EG -2 -4 = -6
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