It is normal subtraction. if the tw numbers are x and y then the subtraction is x-y
If you mean integers, well if you have two integers of the same sign that you are adding, add and the sign stays the same. If you have different signs, subtract and keep the sign of the one that has more. Regular numbers you just add them.
Adding two numbers with different signs means subtracting the two absolute integers (without sign) and vice versa.
-- If the two integers have the same sign, their quotient is positive. -- If the two integers have different signs, their quotient is negative.
I feel that two negatives are positive because you add* your two negative integers* together, you would be doing this: -+- (negative + negative) so the response is, is that if two integers where both negative, you would add, just like if there were two positives, you would add, but not if you have different signs. (positive+negative) you would subtract. Just as the same with negative + positive. [REVIEW: if the sign is the same, add, if the sign is different, you subtract.] *=you may not always add *=integers- a fancy word for numbers.
The answer depends on what you wish to DO with them.
Add their magnitudes, and keep the same sign for the sum.
-- Their sum and difference both have the same sign that the two integers have. -- Their product and quotient are both positive.
-- If they both start out with the same sign (both negative or both positive), then do this: . . . . . add their two values . . . . . the answer has the same sign as the two original integers. -- If they start out with opposite signs (one negative and one positive), then do this: . . . . . forget about the signs . . . . . find their difference (subtract the smaller number from the larger one) . . . . . give it the sign of whichever original integer was the larger number.
You subtract the smaller from the larger and give the answer the sign of the number with the larger absolute value.
You get a product which is positive.
Subtract the number with the smaller absolute value from the other. Give the answer the sign of the number with the larger absolute value.
The product of the two numbers is them multiplied together.