Question

Explain how you decide whether the final answer to a multiplication problem is

Answer 1

Explanation:

Regardless of the number of factors, the product will be negative if an odd number of factors are negative.

In the example, 3 of the factors are negative. 3 is an odd number so the product will be negative.

  -2*-3*-1*1 = -6

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Of course, the product will be zero if any factor is zero, regardless of the signs of any other factors.