Here's a useful tip to use when multiplying or dividing intergers:
2 positives = positive
2 negatives = positive (that's right, positive!)
1 positive, 1 negative = negative
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No, a positive minus a negative can be either or positive or a negative.
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The smallest positive integer is 1. 1 is the multiplicative identity; ie anything times 1 is itself. The greatest negative integer is the most positive negative integer which is -1. Therefore the product of the greatest negative integer and the smallest positive integer is the greatest negative integer which is -1.
No, if a negative integer is multiplied by a positive integer, the product is negative. However, if both of the integers are either positive or negative, the product is positive.
There are just three possible cases: Positive integer: positive x positive = positive. Negative integer: negative x negative = positive. Zero: zero x zero = zero.