2006-06-22 22:14:26 · 4 answers · asked by t_a_jd 2 in Science & Mathematics ➔ Mathematics
Assuming an 8-bit register:
00111000 - 01111011 = 10111101
It may appear at first that the difference as expressed is the positive number 189, but it is actually the 2s-compliment form of expressing a negative number. As such, the solution may be extended for any sufficiently large register size, e.g. 16-bit:
1111111110111101
2006-06-23 06:22:25 · answer #1 · answered by stellarfirefly 3 · 0⤊ 0⤋
It would take both numbers, convert them to binary, compare the two, decide which is greater, subtract the lesser from the greater, append a negative sign, and convert the difference back into a decimal number for your viewing pleasure.
IE, 56-123 = - |123~56|, but the computer would do this in binary.
2006-06-23 02:13:34 · answer #2 · answered by bequalming 5 · 0⤊ 0⤋
-67
2006-06-22 22:21:08 · answer #3 · answered by NotEasilyFooled 5 · 0⤊ 0⤋
111000 - 1111011 = negative 1000011
2006-06-23 02:54:35 · answer #4 · answered by gabrielwyl 3 · 0⤊ 0⤋