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The signs use an exclusive OR gate where if the output is 0, then the signs are the same.Hence, add the magnitudes of the same signed numbers. If the sum is an overflow, then a carry is stored in E where E = 1 and transferred to the flip-flop AVF, add-overflow.Otherwise, the signs are opposite and subtraction is initiated and stored in A.No overflow can occur with subtraction so the AVF is cleared.If E = 1, then A > B.However, if A = 0, then A = B and the sign is made positive.If E = 0, then A < B and sign for A is complemented.
Ok i can see where you would have trouble with this. When i first started Algebra, i wasn't quite sure how this worked. Here are some examples: 2-+2=0 the subtraction sign cancels the addition out. (2-2 is the same thing) 2- -2= 4 the two subtraction signs make an addition sign. (2+2 is the same thing) I hope i could help you.
The answer depends on which binary operation you mean when you say "combining". Addition, subtraction, multiplication, division, exponentiation, etc.
who invented subtraction?
read the value A,b store the result of subtraction of a,b in continer subtraction display subtraction