When adding- yes When subtracting-noWhen multiplying-noWhen dividing-yes
yes i.e -7 + 2 = -5
Yes, if you are adding 2 numbers together and the value of the negative number is larger than the value of the positive number.Yes, if you are multiplying a positive and a negative number...
Its because that's what they came up with. Its just mathematically correct.
yes, 1 neg. + 1 pos. = neg. 2 neg. = pos.