Math
MEMBERS
12 Members

Teaching Jobs on Teachers.Net

Start a new discussion...
Ask your students to explain this trick
Pil On 7/14/13, PedagoNet wrote: > > > Ask your students to explain this trick

Interesting.

Well, let's say you choose a two digit number AB. Using expanded notation and place value, this represents the value 10A + B.

If we take (10A + B) and subtract the sum of the original digits (A +B), we get (10A + B) - (A+B) = ...See More
Aug 9, 2013


Teacher Chatboards

States

Subject Areas

Language Arts

Foreign Language