How to multiply 8 and -6 using 2's compliment method?

2 respuestas

  • Dixon
    Lv 7
    hace 1 mes

    If you are given 8  x (-6) as decimal numbers (ie like in this question) the answer is clearly decimal -48. Then convert 48 to binary and do 2's complement.

    If you are given the numbers electronically in binary, like in an ALU, the -6 is already in 2's complement form. Multiplication works directly on 2's complement numbers just the same as with positive numbers. So in this case x8  is achieved by shifting binary -6 left three places and filling with zeros from the right.

  • geezer
    Lv 7
    hace 1 mes

    In 2's compliment form, a negative number is the 2's compliment of it's positive number, with the subraction of the two numbers being A - B = A + (2's compliment of B) using much the same method as before, as basically, 2's compliment is 1's compliment + 1.

    To get the 2's compliment negative notation of an integer you write out the number in binary .. invert the digits .. and add 1.

¿Aún tienes preguntas? Pregunta ahora para obtener respuestas.