Binary Addition Demonstration: 13 + 23 =36
<a href="//commons.wikimedia.org/wiki/User_talk:LitFlower171" title="User talk:LitFlower171">LitFlower171</a>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Binary_Addition_Demonstration.pdf" title="File:Binary Addition Demonstration.pdf">Binary Addition Demonstration.pdf</a>