Categories VideoStream Math trick that adds up Post author By Tim McDaniel Post date May 22, 2014 No Comments on Math trick that adds up Multiply any number with lines. Very nice. ← Lucky Unlucky → Best use for beer bottles Leave a ReplyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Δ This site uses Akismet to reduce spam. Learn how your comment data is processed.