SOLUTION: how do you add, subtract. multiply, and divide negatives?

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Question 501893: how do you add, subtract. multiply, and divide negatives?
Answer by josmiceli(9817) About Me  (Show Source):
You can put this solution on YOUR website!
If a and b are both unsigned, here are the rules:
+-a+-+b+=+-%28a+%2B+b%29+
+-a+-%28-b%29+=+-a+%2B+b+
+%28-a%29%2A%28-b%29+=+%2Ba%2Ab+
+%28-a%29%2F%28-b%29+=+%2Ba%2Fb+