I totally needed the video to make sense on that 22B. That is a much simpler way to write up the same concept. Oddly it seems vaguely familiar to me and yet it's not the primary method I remember from school.

You are right that the difference I mentioned in long multiplication is cosmetic, but given the issues raised in the book it's clearly a huge stumbling block for many children and there are many adults who get to adulthood possibly able to follow the procedure but with no comprehension of how/why in works (ie that you move over to the tens column because you are in fact multiplying by 10s now), which putting in the zeros explains (or forces to be explained).

Last edited by MumOfThree; 09/12/13 11:11 PM. Reason: Spelling