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Homework Help: Simple Binary addition

  1. Oct 24, 2011 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    3. The attempt at a solution
    The answer I get is 1010111011000101
    but I have used matlab and the first four digits are backwards on my answer per matlab. I am confused on how they get that when carrying the 1 starting with the 12th row from the right.
  2. jcsd
  3. Oct 25, 2011 #2


    Staff: Mentor

    Rows are horizontal. Columns are vertical, just like the columns in a building. Starting from the 4th column from the left, you're adding 1 + 1 + 1 + 1 + 1 = 5 = 1012. You have a 0 at that position, and you should have a 1, and you need to carry 4 (or 1002).
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