Answer :

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You should know that :

Two negatives = Positive
Two positives= Positive
One positive and one negative = Negative 

So to answer the examples: 
1. -8
2. 2
3. -8
To multiply or divide signed integers, always multiply or divide the absolute values and use these rules to determine the sign of the answer:1. The product of two positive integers or two negative integers is positive.
2. The product of a positive integer and a negative integer is negative.

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