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Reading and writing large numbers

A number like 143567821 is hard to read at first glance (perhaps even at second glance). How should we read numbers like these? How can we make it easier to read and write such large numbers? Created by Aanand Srinivas.

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Video transcript

if I have a number that looks like say one three four five seven nine maybe so it's a six digit number and if I want to read this number how do I do that what do they even mean what do I even mean when I say I want to read this number I mean that I want to say hey this number has some hundreds tens and once I'll say that in the end some thousands some thousands and I'm only putting two blanks because I cannot have more than 99 thousand because after that it becomes a lakh so then I just want to say oh some lakhs right so some lakhs some thousands again four lakhs I'm putting only two blanks so I'm gonna write what I want to call them below here some lakhs some thousands and some a hundreds tens and ones and we're gonna write just hundreds tens maybe I'll read it fully once and we and we read these together we just say 721 or in this case 579 so this is what we want when we say we want to read how many lakhs how many thousand is how many hundreds tens and once so then we look at this number and then we decide to do that and what do we do we say oh this is the ones place this is the tens place this is the hundreds place this is my 10 oh sorry this is my thousands place I wanna put th and this is my ten thousands place tth am I doing this correctly once tens hundreds thousands ten thousands and this is my lakh place or lakhs place I'm just gonna put an L over there with this I'll know that huh there's one lakh there is there are three ten thousands and four thousands so three ten thousands plus four thousand six thirty four thousand and there is five hundred and seventy nine so there's one lakh thirty four thousand which we called just thirty four thousand and five hundred and seventy nine great and now I'll ask myself instead of way to do this is easier if I don't want to have to write you know all of this find out once place tens place on displays and so on can I do this quickly then I know that these three places my thousand play starts so I'm just gonna put a comma there and then two more places later I'll put another comma now why am I doing this I am doing this so that I can separate out my thousands and then I can separate out automatically my 100 sends in once and on whatever is there on this side is my lakhs and crores in this case there is just one lakh now what I can do is maybe make this number bigger if I make this say three another three over here so if this number had just been three one three four five seven nine that's a seven digit number then I would've done the same thing go three steps here put this comma two more steps put this comma right and now I'll read this number is there's another three in the ten lakh place so I'm gonna call this the ten lakh TL so then it's 31 lakhs thirty four thousand five hundred and seventy nine so I have 31 lakhs 34 thousand five hundred and seventy nine so you see why we are putting these commas it just makes it easy to read there is no other reason and it's not a rule it's not like go three steps here then put one comma then go two more steps put a comma no this is simply because we have named a lakh to be equal to a hundred thousands right and a hundred thousands can just be two dashes because after that after ninety nine thousand you cannot have any more thousands simply because you'll start calling them lakhs and similarly after lakhs after 99 lakhs you can't have any more lakhs you can't have hundred lakhs but this will start putting it into the crore bucket and start calling it crores so this whole idea of putting it after to two blanks after the first three is simply because of the way we have named numbers in the Indian system and how many crores can be there this is like as many blanks as you want to just putting three here but this can just go on because krause is the last name that we give in the Indian system so let's look at one number so that we understand how to use crores as well so maybe I can have 7 2 3 4 5 6 to 9 I don't know how many have written 1 2 3 4 5 6 7 8 hey this should be good and then I go alright now how do I read this number going by what I just learned I'm gonna put one comma over here and if you want to you can put a line if you want you know however you want to separate these digits and then put one more come over here and then I know I'm in my thousands place here and then if I can put one more comma now I know separated out my lakhs and ten lakhs as well and whatever remains on this side it's my crores so this makes it super easy to read I know this number now is 7 crores 7 crores 23 lakhs 45,000 629