Learn how to multiple and divide plus add and subtract positive and negative numbers. For example, what are the signs of the following? 5 x 5 = -5 x 6 = -5 x -6 = 6 - 3 = -3 + -2 = For multiplication and division the rules are same signs the answer will be positive and different signs will be negative. For addition and subtraction the rules are same signs then keep the signs and different signs take the sign of the larger number.