Saturday, March 7, 2009 – Math Trick # 1 – Multiplying and Dividing by 11 in Your Head

Put down those calculators! Using these mental mathematics tricks, you can free yourself from calculator overuse!! Today’s math trick is multiplying by 11 and dividing by 11. Included is a proof for why the dividing by 11 works. Click picture below to enlarge if you need to.