Guy’s trick to multiply 3 digit numbers by 11 2 May 2013

Guy, Molly, Joanna, Vera and Hollie have been learning a neat trick to multiply numbers by 11.
Have a look at this website for the know how:
http://resources.woodlands-junior.kent.sch.uk/maths/timestable/tricks.html#11
After learning the method, they taught the rest of the class how to do it.