There will be many who maybe won't work that out
We are told that a lot of younger generation have problems with basic maths
When daughter was at school the way they taught times table wasn't i thought that good. I stuck to my guns and she learned them the way I was taught.
Maybe it's me but I never could see how it would be easy for her to do a quick calculation in her head by the 5,10, 15,20 way. To me the old fashioned 1x5 is 5 made more sense for quick calculations.
Be it right or wrong what I do know is that although she's not a well pixie these days she's still a whizz at mental arithmetic - her name 'the calculator' given by teachers still stands
ps - she doesn't take after me