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简答题已知X和Y,试计算下列各题的[X+Y]补和[X-Y]补(设字长为8位)。 (1)X=1011,Y=0011 (2)X=1011,Y=0111 (3)X=1000,Y=1100
  • (1)X补码=00001011,Y补码=00000011,[–Y]补码=11111101,[X+Y]补=00001110,[X-Y]补=00001000
    (2)X补码=00001011,Y补码=00000111,[–Y]补码=11111001,[X+Y]补=00010010,[X-Y]补=00000100
    (3)X补码=00001000,Y补码=00001100,[–Y]补码=11110100,[X+Y]补=00010100,[X-Y]补=11111100
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