SOLUTION: whats the rule for switching the sign?

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Question 50273: whats the rule for switching the sign?
Found 2 solutions by Nate, stanbon:
Answer by Nate(3500) (Show Source):
You can put this solution on YOUR website!
If you multiply or divide by a positive number, you do not switch the sign.

If you add or subtract by a negative or positive number, you do not switch the sign.

and

If you divide or multiply by a negative number, you switch the sign.

Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
whats the rule for switching the sign?
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A fraction has three signs:
1. the sign of the fraction
2. the sign of the numerator
3. the sign of the denominator
RULE: Any two of the signs may be changed without changing
the value of the fraction.
Cheers,
Stan H.