The Abacus Presentation: History, Theory and Operation
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- Опубликовано: 28 сен 2024
- Joe made a presentation on the history, theory and operation of the abacus, at the Esther Bone Public Library in Rio Rancho, NM. This is the story of that presentation.
This was amazing. Thank you for such a lucid presentation. Opens up a new world of possibilities for game developement for me. Thanks.
Excellent presentation Joe! I learned how to teach the abacus through my college studies for Teacher for the Visually Impaired. I studied The Cranmer abacus and you can find excellent teaching materials by searching The Cranmer abacus. Students with visual impairments learn math basics with an abacus.
Your teaching skills are great, Joe..The best thing schould be to have for each student an Abacus on hand to do the calculations showed paralell with you...and then sell these abacusses to the students with a script.🙂
Mr. Van Cleave. Please talk about the mesoamerican abacus called Nepohualtzintzin.
Thank you for sharing God Bless
I’m betting you’re already aware of it, but there’s a delightful small soroban store near Senso-ji, in the Asakusa part of Tokyo. The shop has been there for three generations, and they have a ridiculously large abacus in the front window.
Thanks for these precious informations and also thanks for the labor
Im curious - roughly how many people were in the audience?
Is there any book on Flash Anzan ? I'm interested in learning mental arithmetic with an imaginary abacus that's used in mental arithmetic contests.
3,141,592
Well done!
Hi Joe! I saw your videos about the typewriters you collect and they are some beautiful machines! I'm wondering if you sell them and if you do that we could get in touch.
Thanks so much
-David
Sorry, I’m just a collector!
Joe, I MAKE Sorobans. About three dozen so far. I use various materials and some of my sorobans have 'bells and whistles' - additions that you won't usually find on a traditional soroban. When did I start? 1964 - the Hong Kong Pavilion at the NY World's Fair. I bought a nine-rod Chinese abacus. I put it away for years. In the early Nineties I was in Borders Books (gone!) and found Kojima's 'Advanced Abacus.' And yes, I also have his first book. That lit the spark! Most of my sorobans are made from bamboo - my wood of choice. I lost count of the number of the times I fed bamboo skewers into drill bit gauges to taper it down to the bead hole size. Also for rods I like fiberglass electrician 'fish rods,' especially the glow-in-the-dark ones. And yes, I made glow in the dark sorobans. Most of my sorobans have an additional single red bead located on the left frame. This is my 'negative bead' that I slide up when I'm on the negative side of the number table. Works for me! I've even made the reckoning bars out of plastic chopsticks. Traditional sorobans have an odd number of rods, but I've made some with even numbers. Ebay and Etsy is bead heaven. If I can't find bicones that I like, I'll use saucer or saturn beads. To hold the frame and or base together I like using bamboo nails that of course, I make. Lastly, I absolutely love the YT video entitled "The Making" - the old Japanese craftsman making soroban from scratch with tradition tools and machines. He even puts the newly turned beads into a sack, spoons in some wax, seals the sack, and rolls it on the floor with his feet. The beads come out nice and shiny. Amazing!
(For new people interested in learning the soroban, the secret in operation is in what the Chinese call, 'secrets.' A 'secret' is a distinct movement of the beads for any given number. There are seventeen 'secrets' for addition and seventeen 'secrets' for subtraction. You'll know what secret to use just by looking at the rod. Hold on! It's not that bad. Learning the secrets are like riding a bicycle - once you learn them, you'll never forget them.
You should also have knowledge of the good ol' 'times table' that you learned in Grammar School. You'll need that for multiplication and division. That's it. With the soroban you do not do any math in your head. You just move beads!)
Great vídeo!
Chisanbop (1:4 finger math) appears to be adapted from the abacus. Why isn't Chisanbop more popular in schools?