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If the two numbers have different signs, then the result will be negative. If the two numbers have the same signs, the result will be positive. This assumes all the numbers are non-zero.
Then you are adding two rational numbers with different signs! No big deal!
The word signal has two syllables. The syllables in the word are sig-nal.
You get a positive answer when multiplying two alike signs because since its an even number of positive signs, the number will be positive. For example, -2 x -4= 8 since there are an even amount of negative signs.
The value of the quotient of two integers with different signs is the same as if the signs were the same. Because the numbers have different signs, the quotient is negative.