This was designed for adding up a page of numbers as in a ledger, before the days of doing it on a computer. It gives you a check of your result without having to add everything up again.
Trachtenberg developed these methods (there are more than this one) while in nazi concentration camps when he had no access to pen/paper. He later went on to teach children with learning disabilities and was quite successful (if my memory serves me - its been years since I've read the book on his method) when traditional methods were not. I've never heard of this movie, will need to check it out!
Trachtenberg was obviously gifted. Only gifted people would possibly find this way better. Normal people could not do this in their heads quickly..... I can do arithmetic in my head relatively quickly compared to most people I know... I just break things down to smaller sums that I can see in my head and the add them together... But this method is impossible in my head. Even strangely complicated on paper.
It’s fair to say a lot of us came from the movie gifted. Gonna take some practise but this is very interesting 🤔 it’s nice to learn new things 👌🏾 feel like I’m still in school getting ready for GCSE’s 😂😂
Kenny L Anderson Jr you write 10 and carry on otherwise the first 'check won't work, 3721+846+1347+326 after adding I have 4 numbers 4,10,1,9 and 2nd line 0,1,1,1
No, you don't carry the one, you put 10 in that column. The top working row is the remainder of dividing the columns total by 11. The bottom row is how many 11s you got.
The method was designed for adding long lists of numbers, before the time of keeping accounts on a computer. Being able to only recheck one column if you made a mistake saves time.
Husker for example, take the number 1244. Add up all the digits, and you get 11. Add up the digits in 11, and you get 2. So the digit root of 1244 is 2. It always has to be 1 digit
when you're checking using method 1 if you get a 10 what do you do when i added 1+0 it turned out different on top i got 1 and in the bottom i got a 0 i used my own problem
Thanks for the explanation! Wouldn't this be easier by subtracting 1, and not having the second row of addition? It works for the first problem, can't see why it wouldn't work always...
I love your thorough explanation... but I do have an issue... the cite you give at the end of the video... does not work properly... I ask for a new password... it says chk your email for it... and I get no email... I have been trying to get a chance for a new password since I lost the other one.... and not email is being sent to fix the issue
If instead of not going past 11, don't go past 10, you shouldn't need the L shape in the second step because by 10 is a zero in the one's column. I didn't test this, can someone verify that this is correct?
I'm dyslexic and failed to get my GCSE in English til I was 25 (when I started night classes to get out the house, not cuz I needed it at that point), but excelled at math & science thanks to two teachers who took extra steps customising my education, in a way, & helping me learn with my "disability". I'm now a sr software engineer/software consultant for a tech conglomerate (with an ironic name related to the English language), so pretty successful in life & seen as someone who's "made it", but regardless of that I STILL feel ashamed/embarrassed when I have to write something on paper or type without spellcheck... let alone having to tell people my story about my GCSE's & why I didn't have even an F in English 'til I was 25 (a C, lol). I assume it's the same with math when somebody who isn't great at it has to multiply without a calculator or work out taxes/tax % when simply in a grocery store buying tampons and beer. luckily math/english are becoming easier to learn/be taught thanks to computers. even watching this video is something people should do if they ever feel depressed about their mathematical abilities. sure, most will find it harder, but at least you now know something new (what trachtenberg speed math is) at a minimum, then there's the odd person out there who'll have a lightbulb-brainy-click-thingy (I forgot my wordyz for this) moment & now know how to do difficult addition a lot faster/easier than they use to be able to do. can't be depressed about your shortcomings, gotta always be teaching yourself new things throughout life, else they e
This method is silly. It is much harder to do mental math going right to left. The best mental math mentod is to go left to right using the place values.
Two most important educational necessities. English literature. Mathematics. You all need to learn English literature first, then mathematics Recommended: English Grammar for Dummies, USA and UK versions. Strictly UK, Smashing Grammar by Craig Shrives. You'll appear to the world as educated. That's worth having. The pen is many times more mightier than a sword. (UK)
This way is HARDER for most people. Everyone has their own way of multiplying large numbers. Each mind has its own method. This was simply That jewish guy's method. Good for him but I'll use my own method.
i also think so! But this method requires practice so you can do this faster with your head. its not after you learn the method, you'll already be compute faster
okay so can some one explain this to me: i have done a seperate calculation while following this video and it is correct until the last part where in the video he gets two 4's i get 18 and 27, because im able to take a nine from my result (9666) but not from my digit root (8577) if i don't take nine from any the both end up as 27 but not if i do it exactly as told in the video. my calculation looks like this 8577(digit root) ------------------------- 00063 00521 00072 06381 02629 ---------------------- 08335 00121 ------------------- 9666 Digit root: 18 8577 Digit root: 27 technically if i count the 9 they both end on 27 but i was instructed to take all the nines and everything that could give 9, away.
