What does it mean to multiply a number by -1?

Multiplying a number by -1 means the sign on the number is made opposite. If the number was positive, it becomes negative. If the number was negative, it becomes positive.

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the naturalist literary movement was an extension of the realist literary movement, a movement that strove to portray life as it really was hope it

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for me what is finding a good play list and going out because i can not lay down and relax so i usually go to a coffee shop. i also use the gum trick and this actually works. another advice is highlighting subjects it really does me remember certain things

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