Makes you wonder if whichever genius came up with that could subtract 13 from 43, no matter which method they used.Vraelomon said:
J said:
It's Tom Lehrer, so it's from the 50's or 60's; and he was a mathematician, so he probably knows his ****.Si-A-erra. said:
What is this bull****? I work in a primary School and the maths we teach is pretty common sense, then again I live in Britain and we have common sense (No fence murica).
Si-A-erra. said:Having a quick look at it it seems like a much longer and slower way, I'm hoping this is used as support and not mainstream? It'll just slow down the kids that can do it fine the normal way.
I can see it could be helpful with special needs though, as you actually show every single step.