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Math Help - Minus problems

  1. #1
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    Minus problems

    Can anyone explain in words why minus one times minus one equals plus one please?
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by Hamilton Smythe View Post
    Can anyone explain in words why minus one times minus one equals plus one please?
    Maybe this will help you understand:

    Negative and non-negative numbers - Wikipedia, the free encyclopedia
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  3. #3
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    Quote Originally Posted by Hamilton Smythe View Post
    Can anyone explain in words why minus one times minus one equals plus one please?
    Here's a way to experience it: If you film yourself walking backwards, and then play the movie backwards, you'll watch yourself walking forward (and a bit awkwardly...). In the process, you multiplied your (forward) speed by -1 two times.
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