That’s the title of my latest article in Mathematics Teaching (May 2013, Issue 234), for the ATM (The Association of Teachers of Mathematics). Hoping it will be read by many! It should help parents, teachers and tutors with explaining and understanding the two main written ‘pencil and paper’ methods of subtraction.
Do check it out at: http://www.atm.org.uk/journal/ Didn’t know that there are two main methods of carrying out a written subtraction? Then please do TAKE THE TEST, add your comments and see the 5-minute lesson that explains about it. Together I believe we can take away the confusion!