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Edited by Lord Cheerios:
2/21/2014 7:08:42 PM
43
I think my 6 year old brother just made up his own math formula.
I'm going to try to explain this as best as I can. I am still confused about it as he can't explain well.
He made this list in his head;
1- 9
2- 8
3- 7
4- 6
5- 5
6- 4
7- 3
8- 2
9- 1
So lets say he's doing 7+3.
He'll take the lowest number (3) and turn it into a teen (13). So it would look like 13+7.
But then he'll use his list and take the opposite of the other number and replace it. So 7 would be 3 and vice versa. 2 would be 8 and vice versa.
So then the problem would look like 13+3. But then he'll flip the sign into a subtraction symbol and do the problem and get the answer.
But this formula only seems to work with the numbers between 1-9. So someone tell me if this has been an established formula or if my six year old brother is a genius?
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This is just a really round about way to complete an extremely simple math problem. If it works for him that's fine, but this is not new or mind blowing, sorry.
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Edited by STARSIDE DESTINY: 2/22/2014 6:02:25 PMBasically you just add 10 to the problem to start. Then when you use the list, you can see that each combination adds up to 10. By switching the numbers using the list and then subtracting that number, you're just subtracting 10 from the original problem. It's still pretty cool though, congrats to your brother. EDIT: Other people already pointed out how it works, I didn't read the comments before I posted.
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2 Replies...Or he could just do 7 plus 3.
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4 RepliesYeah! Wait...
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3 RepliesIf I'm doing this problem 18+25+72+16+9 I reorganize it like this (18+72)+(25+15)+(1+9) (90)+(40)+(10) (90+10)+40 140
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Cool, but unnecessary. If its just for adding numbers between 1 and 9, then your brother is making simple arithmetic more complicated and time consuming than it has to be.
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He's not smart he's a retard.
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OR. He could do 7+3 and get 10 the normal way.
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I made my own math once but I named it after my cats I can explain it but it would be like. 30 paragraphs
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Props to him for figuring that out, but it's totally useless and people have already thought of that.
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2 RepliesIf it doesn't work for 5 then it's useless.
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1 ReplyI would encourage him to keep thinking like this. Not necessarily the way he does math, but the back thought it took to come up with it. What it shows is that he's looking at the systems and synthesizing his own. It's too early to know if he will be a genius, but he shows all the signs of being exceptionally smart.
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Started a new topic: I have figured out a math formula!(5 Replies))
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2 RepliesI always had trouble adding numbers past a multiple of ten (so like 66+7) so the way I do it is to figure out how much I need to get to the next one (so 4) and then figure out what I have left and then add it on (3, so the answer is 73). If it's larger numbers like 47 then I'll add the tens and do the same as above once I've only got single digits to worry about. Different minds work in different ways.
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1 ReplySeems needlessly complicated.
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2 RepliesI don't really get it to be honest.. Why make it so complicated? Are you smart for solving something in a more complicated way, or when you solve it the easiest way? Because to me it seems everyone chooses for the latter.. :p That's why math is so hard to me. It's so complicated sometimes and it just doesn't make sense to me anymore. Why can't it be simple and easy?
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4 RepliesThis is similar to, think of a number, double it, add 60, half it and take away the number you were thinking of.
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1 ReplyI wouldn't say a genius. Just thinks outside the box. It would be obvious if he was.
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1 ReplyYou're brother is stupid if he can't just add 7+ 3 without some crazy ass procedure.
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23 Replies[quote]if my six year old brother is a genius?[/quote] That is not something that can really be figured out based on this one story. Based solely on it, the answer is no.
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1 ReplyI'm not sure I'd encourage this. It's a clever trick (basically adding 10 and then subtracting), but it has its flaws. The main problem being that it only works with numbers 1-10. This is obviously enough for a 6 year old, but if he never learns how to "properly" add and subtract, he may run into issues later. Something similar happened to my cousin when he was younger. He had his own way of subtracting things that worked fine at first, but when he was confronted with larger numbers and more complex problems he had issues coping because his trick no longer worked.
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1 ReplyDutchy theorem: 1. If an equation: Keep as is. If a single term/concept: Set equal to any number 2. Multiply both sides by zero 3. Get 0=0 4. Move on to more relevant problems in life.
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x+y x+10 10-y (x+10)-(10-y) x+y [spoiler]I think this is it. Don't shout at me![/spoiler]
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This is really cool
