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Obtain Binary String ?

  1. Jun 7, 2009 #1
    Obtain Binary String ????

    1. The problem statement, all variables and given/known data

    Given That X=10111 ,Y=101; Z=1001, obtain binary strings that represent P Q where
    P=X+Y and Q=P-Z; state clearly each rule you apply .

    2. Relevant equations



    3. The attempt at a solution

    Hey up to the extent which i know i did this as a normal binary addition and subtractions >then i got P=10010
    and Q=1001 .But the problem is im not sure that i have used any kind of rules here. or Have I ?? Or did i made a mistake in interpreting the problem .Can somebody help . this is all u got for that question ,i have included all the details.
     
  2. jcsd
  3. Jun 7, 2009 #2

    Mark44

    Staff: Mentor

    Re: Obtain Binary String ????

    Doing binary addition, I get a different result for P. The addition rules in binary are:
    0 + 0 = 0
    0 + 1 = 1
    1 + 0 = 1
    1 + 1 = 10

    I can't think of any rules other than these.

    So for X + Y you have
    10111
    + 101
    -----
    11100
     
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