Doplication
This is an investigation that can lead to pupils thinking quite
hard. I've found that they really enjoyed this "Alternative"
multiplication activity.
For pupils who are confident and you're looking for some lengthy
extension work that allows them to think and discover then this may
be just what you want.
I found it extra helpful if they know about digital roots. See the
teachers notes for EWWNP for the work on Number Patterns if you are
unsure about this work.
The ?Table would start off as:-
