What's My Favorite Abacus?
ฝัง
- เผยแพร่เมื่อ 14 ธ.ค. 2020
- Joe reviews his extensive abacus collection, answers the question of what’s his favorite abacus and gives some tips on starting your own abacus hobby.
Some good starter abaci available online:
amzn.to/3r2kdXO
amzn.to/3mojTz4
amzn.to/3nAgNZW
Kojima’s books:
amzn.to/3nrEUtV
amzn.to/2WfWgy2
Japanese soroban video: • Video
Chinese abacus in use: • Chinese Pharmacy Clerk...
Russian abacus in use: • Abacus in use
Mental abacus calculations: • Mental Addition Subtra...
Mental abacus vs calculator: • Abacus vs calculator task
Traditional Japanese soroban construction: • Incredible Japanese Wo...
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I like the way the solution of a multiplication problem forms almost magically after the operation on an soroban.
I'm so used to watching skateboard videos with fisheye lenses that I couldn't even tell those edges were curved on the soroban. It might be time to start fiddling with the abacus instead of just skateboards. Life is good.
every indication seems to be that the New Mexico antique scene is fire
Thank you for clarifying the qualities that make a good abacus. I will re-evaluate my collection now! I also have small brass ones that are 2/5: one's on a marble base as a paperweight, another is a belt buckle. And teeny metal ones to wear as a locket/charm!
Silver City is not known to me, but in traveling around America, the quiet small US towns where US military retire often have just amazing and wonderful antique store finds. A lifetime of serving abroad often yields relevant finds in odd locals. Found two teacups near Astoria, Oregon, that were very likely part of a set for a third rank Chinese Imperial concubine.
You inspired me to learn the 100 bead abacus (its what I have). I'm currently a freshman in math college in Brazil (I'm a wanna be teacher). Thank you, very much! I think you should do a video on the 4 operations in the 9 bead abacus. Keep the good work!
Hi Adler, I’m currently learning the 100 bead abacus, too. I just wondered, have you come across any info on how to calculate decimals on the device? When I run a google search all i can find are lessons to work out decimals on the Chinese and Japanese Abacus. Best wishes.
@@aimeefoster1613 Decimal numbers have two parts, like 17.35. Mentally divide the abacus in two parts, the left is the integers, the right is the decimals. I made an abacus with 2 rows of beads of different colors from the rest so its easy to calculate the cents when dealing with money.
Such a nice collection of pieces of history!
Abacuses are fascinating because they can still be very useful in today's era.
Marvelous collection. I have a very modest collection myself, but I also make them. I'm currently constructing an authentic Sumerian sexagesimal abacus which should be quite the sight when finished.
I'd love to see it when it's completed.
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You should learn to do dozenal math to put those 1/5's to proper use; once you learn your dozenal multiplication tables it's really easy!; you can download a free calc., from the app store, to check your work.
My fav. soroban is the 23 digit 1/5 made by Sun (Nanjo & Co); it is similar to the Tomoe brand but with larger beads.
Getting a proper 9 bead with alternating colors is next on my list. =)
I do use the standard Kojima multiplication method for the 1:4 version. I’ll check out the dozenal method .
My adult son is interested in abacuses? Abacusi? in other words an abacus. I am a wood worker who can cut fairly straight lines. I might have missed it, but what size should the biconical beads be for an adult sized abacus? However you state it, I can convert sizes. I know how to do such things because I have the internet. Thanks in advance. P. S. Have you ever thought of making an abacus using truck tires? Just a thought. Thanks again.
Beads at least 10mm in diameter for adult fingers, 15mm is better.
I haven't made a super-large abacus, but there's an abacus-like sculpture near Airport Road in Santa Fe, NM, made of large stones on metal rods.
one of the very few times where something biconic is also very iconic
the abacus in the beginning
I used my abacus to count the number times he says "kind of"
Good craftsmanship. I love (Japanese) Soroban much more than (Chinese) Suanpan.
I'm told that on the schoty (the Russian one) the 4-bead column denotes quarters, then the 2 columns next to it are the decimals.
If you rub a thumb or dry sponge along the bar, surely that resets them quick and without a mechanism to jam ...
Thumbs up if Questionable Content #4527 inspired your search that led you here!
Hi Joe, i have a few questions. does the change in bar colours help in learning and imagining fast ?Also, i like to add 10 bead before taking a complement. so far it is much better to follow the calculations and i make calculations easily. will this approach help me in future or not? yours channel is the most logical one found for learning soroban. keep up the good work. are your grand kids doing anzan with your 9 bead nonus ?
Whichever method you use to take compliments is easier for you to do, keep doing it. Kojima in his books describes the method that is fastest, keeping in mind the Japanese ranking system of students competing to be as fast as possible. I think you can become competent using whatever method works best.
As for colored beads, they can be of help in calculations, but you need to try them to see if they work for you, everyone is different. Thank you for watching!
My grandkids haven’t shown much interest. But anzan is best done with the 1:4 version because it’s harder to mentally visualize nine beads.
Those books are now hard to get. Have you had any other books that still might compare to those books?
where can I get the big 1/4 beads?
This is the one I bought from Amazon: www.amazon.com/dp/B00SQW8EYS/ref=sspa_dk_detail_0?psc=1&pd_rd_i=B00SQW8EYS&pd_rd_w=svf8u&content-id=amzn1.sym.56b6d1e1-8781-4e32-a7bc-5298ad4b88ac&pf_rd_p=56b6d1e1-8781-4e32-a7bc-5298ad4b88ac&pf_rd_r=2HX0319Q4PKV848CK57V&pd_rd_wg=ZVkDQ&pd_rd_r=548d2b4f-e0b3-4bfc-a342-842374abac30&s=toys-and-games&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWwy&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyUDJOMkhBTjI2OVdMJmVuY3J5cHRlZElkPUEwMzY0OTc1MlBFMjJXRTJQWTYxQyZlbmNyeXB0ZWRBZElkPUEwMTgxNjQxMjYwR1dGTDEwVFhOTyZ3aWRnZXROYW1lPXNwX2RldGFpbDImYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl
not this one.the soroban that there is japanese writing on every column
@@genarodejesus3583 These are "legacy" abaci that are made by craftsmen in Japan. You can look online at places by eBay and be surprised at their cost!
@@Joe_VanCleave ok thank you
I love your concept of 9 bead abacus with alternating colored beads. It is very simple and basic yet very efficient.
The most interesting concept I saw with the 9 bead abacus is how simple it is to represent and read negative numbers with it. Just by looking at the beads on the bottom.
Yes, this negative number method is mentioned in Kojima's books on the Japanese soroban also. You have to add a 1 to the value represented by the negative numbers to arrive at the correct sum, when using negative numbers (this is because the abacus represents 0-9 in each column, instead of 10 in each column.)
@@Joe_VanCleave The abacus’ ability to deal with negative numbers makes it a powerful device indeed. I think making the last column able to represent 0-10 is enough to make adding 1 more explicit, instead of doing it mentally or making each column able to represent 0-10.