Do any of your students get in a mess with “double borrowing”? There’s a very simple solution which builds on their existing knowledge of subtraction with borrowing….

# Subtraction Confusion – a very simple solution

There is a very simple solution to this, encourage the student to look at the number differently. Borrow ONCE from the “200” on the top, which becomes 199.

Try it on a student near you, and use the reply box to tell readers what happened next!

When I tried this on a 12 year old low attainer I got a look of deep mistrust, as if it was impossible for maths to be that easy. Now they use it all the time.

Thanks Ben, your feedback is much appreciated. What else do they struggle with? (One topic at a time please!!)

Rosalind