LionJim and other MATHS. geeks, what do you think of this?
Very clever, even though I don’t get it.
Very clever, even though I don’t get it.
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Here's a better explanation of it and it's just a different way to write it outLionJim and other MATHS. geeks, what do you think of this?
Very clever, even though I don’t get it.
That’s really fascinating but was this method instituted because there’s a calculator shortage in Japan?
I can see that getting really difficult with higher digits with a lot of lines and counting (79 x 88)
There was an Abbott and Costello skit on addition...it was hilariousI’d screw that up royally.
Know your basic facts. Multiple and add seems to be simpler.
In the followup post by @4rosco, it talks about using arrays. Similar to cuisenaire rods.Usually used at lower grades up to maybe grade 4.
After that, IMO, use the multiply and add method.
When I taught “new” methods, I would teach them, teach mine and tell kids to use either or “mom/dad/grandma/grandpa’s” method. Whatever is easier as long as they learn it.
OL
Which is essentially what common core math does but parents go crazy about itMy son was struggling a bit doing it the 'traditional' way, so I taught him the box method (which is similar to this without drawing the lines) and that can be done pretty quickly. It's just a short cut way of breaking down the problem by hundreds/tens/ones
Back in the 80s we had a guy in our Tokyo office that used an abacus. I bought one as a souvenir and tried it on the flight home. I gave up pretty quickly.That’s really fascinating but was this method instituted because there’s a calculator shortage in Japan?
There was an Abbott and Costello skit on addition...it was hilarious
LionJim and other MATHS. geeks, what do you think of this?
Very clever, even though I don’t get it.