title: Understanding Modified Baugh-Wooley multiplication algorithm
body: <p>For Modified Baugh-Wooley multiplication algorithm , why is it !(A0*B5) instead of just (A0*B5) ?</p>
  
  <p>Same questions for !(A1*B5), !(A2*B5), !(A3*B5), !(A4*B5), !(A5*B4), !(A5*3), !(A5*B2), !(A5*B1) and !(A5*B0)</p>
  
  <p>Besides, why there are two extra '1'  ?</p>
  
  <p><img src="https://i.imgur.com/VcgbY4g.png" alt="Modified Baugh-Wooley multiplication algorithm"></p>