Mental Addition Trick - Add large numbers in your head instantly!

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  • Опубліковано 14 гру 2024

КОМЕНТАРІ • 32

  • @MR-hr5yh
    @MR-hr5yh 5 років тому +4

    I really like this method of addition. However, I'm not sure it's faster. I practiced it with large and small numbers multiple times and it felt faster, but I started timing myself and the timing results were mixed and relatively negligible.
    For 10 individual 8-digit numbers, my times were Carrying: 22 seconds, L2R: 20 seconds.
    For 5 individual 6-digit numbers, my times were Carrying 16 seconds, L2R: 17 seconds.
    Need more data; so far, it seems like it's just a new trick that doesn't necessarily save time. Maybe more practice will help. I'll report back in a few years.
    Edit: Upon a second watching, I noticed that you said this exact fact at the very end of the video. Not always the fastest, but a way to avoid carrying. Thanks for the great videos.

    • @yearlong5179
      @yearlong5179 3 роки тому +1

      easier to do in your head, i don’t think it’s meant to be used on paper but could probably help smaller children with math

    • @mydogskips2
      @mydogskips2 2 роки тому

      @@yearlong5179 I generally agree, except that it is not really meant to be done in one's head, I mean, I doubt most people could add four 4-digit numbers solely in their head without the aid of paper and pencil.
      The paper and pencil just allow us to write down each step, going from left to right, so we don't have to remember everything, something which most of us could not do.
      I mean, maybe I'm wrong, but I doubt our host Josh could add all those numbers together solely in his head without the aid of paper and pencil, not to mention the visual aid of being able to actually see the numbers in front of him.
      If someone just read another person four large numbers to be added together, I would bet very, very few people would be able to do it, I know I couldn't. But I think many more people would be able to do it just as is shown here if provided with paper and pencil. And yes, the video "paper" can be considered a form of paper and pencil for it allows him to see the problem written out, and write the answer down in parts as he calculates the successive steps, he is certainly NOT doing it SOLELY in his head here. I am not criticizing him in any way though, his videos are great and I have learned a lot.

  • @sanjairs6934
    @sanjairs6934 3 роки тому

    Underrated Channel 😞

  • @brucewayne-cave
    @brucewayne-cave 11 років тому +1

    Wonderfully Refulgent !

  • @abhay22am
    @abhay22am 8 років тому +1

    amazing concept

  • @Dramaholic
    @Dramaholic 7 років тому

    awsome trick👌👌👌😁😁

  • @itsGalaxy_Star
    @itsGalaxy_Star 3 роки тому +1

    In Philippines we start from right to left

    • @itsGalaxy_Star
      @itsGalaxy_Star 2 роки тому

      @@sonder.4718 We cares, if you don't care... i don't care but we care

    • @itsGalaxy_Star
      @itsGalaxy_Star 2 роки тому

      @@sonder.4718 We Filipinos, learn how to understand the conversation first, ok? coz i said in Philippines... WE, NOT JUST ME WHO LEARN, THAT IS WHY I SAID WE, UNDERSTOOD?

    • @mydogskips2
      @mydogskips2 2 роки тому +2

      @@itsGalaxy_Star I wouldn't feed the trolls, I mean, clearly, he is not worth your time or reply.
      We learn to do it from right to left here in the US as well, at least I did when I was in school, but in truth, that is a more difficult way to do it.
      I think we learn that way because, for someone who doesn't know how to do it, it may be considered easier, I mean, it teaches place value, the ones place, then the tens place, the hundreds place, thousands place, et cetera, and we start with smaller numbers writing everything down step by step until we add up everything in the end, but really, once you learn that, it's actually easier to start from the left with higher numbers.
      I guess you may not use dollars there in the Philippines (it's actually sad that I don't know, I live in a place with a lot of Filipinos), but it's my default way to explain so I hope you can understand my example with dollars and cents.
      Let's say you went to a store and bought something that cost $3.58, that's three dollars and fifty-eight cents, then you pay using a $20 bill as it is all you have. (Don't ask me why it cost $3.58, or why you only have a $20, ; )
      As the clerk, I would have to make change for you which we know will be $20.00 - $3.58, which is $16.42.
      When I go into the cash register to take the money out for you, I would not start from the right giving you 2 cents, then 40 cents, followed by 6 dollars and then 10 dollars, right?
      No, I would start with the bigger numbers first, going from left to right, in this case, $16.42, I would give you $16 first, that is first a 10 dollar bill, then a 5 dollar bill, then 1 dollar, for a total of 16 dollars. After that, I would give you 42 cents, but I would use larger coins, bigger denominations first, so I would start with a quarter, that's 25 cents, then give you a dime, that 10 more cents, then a nickel, that's 5 cents, and finally, two pennies, that's 25 cents plus 10 cents, plus 5 cents, plus 2 cents.
      To illustrate the point, let's add that out, 25 cents plus 10 cents is 35 cents, then adding 5 cents gives you 40 cents, and lastly, plus 2 cents makes 42 cents (40 cents plus 2 cents). If you do it from right to left starting with the smaller coins it's actually a much more difficult problem, I mean, you start with 2 cents, then add 5 cents, that's 7 cents, then add 10 cents, that's 17 (not difficult so far, I know), but then you have to add 25, I mean, you have to do 17 cents plus 25 cents, and for many people that is not easy to do in their head.
      But if you do it the other way, starting with 25, then add smaller numbers together, it's generally much easier for most people, I think it's just how our mind works.
      I hope that makes sense to you, that you see how it's easier starting with the bigger bills and coins?
      Well, when you are doing these kinds of math problems, adding up a bunch of large numbers, the reasoning is the same, it's generally easier to start from the left with bigger numbers then add the smaller numbers to them rather than the other way around.
      All I can say is to practice, and it should get easier.
      When I did the example he used starting with 3,174, I got the answer correct, doing it just as he would, going from left to right starting with the bigger numbers first. Mind you, I did this all in my head without pencil and paper, just looking at the screen, the numbers to be added, for reference, and as I said, I got it correct, but had I tried to do it the other way, starting from the right, I doubt I would have been able to do the problem at all, not without a pencil and paper.
      When you are doing these kinds of problems in your head, it's usually easier to do it from left to right.
      If you are still in school then I would say to do it the way they are teaching you so you can understand the process and what the numbers actually represent, I mean, taking place value into consideration, but after you understand those concepts and can do it well in longhand, from right to left, I would encourage you to also do the problems from left to right, I truly do believe it to be easier with a bit of practice, and doing so will put you ahead of many people.
      All I can say is that I wished I was taught what tecmath's videos teach while I was in school, but I wasn't and had to figure it out all by myself as there was no UA-cam. Fortunately, the resource now exists which allows people, even young students, to learn what was not taught, what was not available many years ago for students like me. But you have the advantage of these tools and resources, people making videos and others making comments, hopefully trying to be helpful... so I would just say to take what you can from the videos and comments, try them out for yourself, practice with many problems, and learn what works best for you.
      Good luck.

    • @itsGalaxy_Star
      @itsGalaxy_Star 2 роки тому

      @@mydogskips2 Thank you for taking time on explaining it to me, i will try it 😊

  • @CharlieMcowan
    @CharlieMcowan 3 роки тому

    The only reason I watch these videos is to hear them start with "G'day.......".
    I swear.....

  • @orlandohernandez8463
    @orlandohernandez8463 5 років тому +2

    Creo que es más fácil sumar de izquierda a derecha. 30/03/2019

  • @TheSiimur
    @TheSiimur 11 років тому

    Best method for me :)

  • @albertreyes9870
    @albertreyes9870 4 роки тому

    Your Great 🎖️🎖️🎖️🎖️🎖️🎖️.

  • @suman1206
    @suman1206 11 років тому

    Too good

  • @SENNYWAVEKID
    @SENNYWAVEKID 8 років тому

    this is nice

  • @jasonvoorhees5988
    @jasonvoorhees5988 5 років тому +1

    This has become an Addiction trick...

  • @split8180
    @split8180 10 років тому +2

    @3:44 "I will rub one out"

  • @Nusratjahan-fc1tq
    @Nusratjahan-fc1tq 3 роки тому

    Oh my god!

  • @abx5282
    @abx5282 11 років тому

    Wow

  • @atNguyen-px2zs
    @atNguyen-px2zs 10 років тому

    c'mon, this is E.Z

  • @aldolunabueno2634
    @aldolunabueno2634 8 років тому

    Les están engañando muchachos, por lo menos este método no es más efectivo que el tradicional, porque no hay necesidad alguna de colocar los resultados de las columnas en diagonal, se gasta mucho más espacio y al final es lo mismo que colocar la cifra de las decenas arriba de la siguiente columna. Innecesario.

  • @RA-hs6ry
    @RA-hs6ry 4 роки тому

    I got 21,598 UGH!

  • @radheyshyamsharma1909
    @radheyshyamsharma1909 5 років тому

    Time west hence no acvrptef