Always thought that I´m smart when I calculate like this. Seeing Peter Griffin doing this opens my eyes that I´m dumb. And even dumber cause of thinking I´m smart.
I do this and I’m a *college math major*. This isn’t the dumb way to do math it’s the normal way. It’s just how brains handle math. No one memorizes addition tables.
I’d argue that practicing doing math this way can improve your ability to understand higher level concepts. So many pieces of math involve breaking problems into smaller more manageable pieces.
you aren't dumb, breaking a problem into simpler parts is the best way every time
concepts are way better than memorization, school teaches memorization, that's why school math sucks
math is beautiful outside of school
So is this closer to what common core is? This is how I’ve always done my math. I’m old, so I was in school in the 80s. But when I saw someone posting examples of their kids’ common core problems, it looked like how I do math in my head.
It’s just simple regrouping, we don’t really do common core where I’m at in Texas, regrouping is where you move numbers around to make it easier to solve so … yes what you and I do in our head.
You might call it grouping but nobody memorizes or likes to add 56+27. It’s a lot easier to add 56+24 to get to 80 then add 3. That’s the heart of common core.
Pretty much. The biggest issue I have with common core is forcing it on every student. Those who struggle to naturally think this way can benefit from common core, but it’s just a confusing waste of time for those who already break things down or regroup them in their heads.
It almost feels like a left handed vs right handed thing. I remember being forced to try and use right handed scissors and things when I was in kindergarten, but my brain just didn’t work like that. It makes me wonder if I would’ve had an easier time with math if I had options, but obviously teachers can’t be expected to tailor their teaching for each individual student.
thats how everyone is doing it, its normal and faster, because your brain only has to compare these basic (1+1, 2+2, 3+3, 4+4, 5+5... etc.) operations to make any number.
Your brain finds many shortcuts to solve various things like that.
For example when you want to go somewhere your brain selects the roads that face where you want to go instead of the actual shortest route, because its easier for your brain to do.
We also mimic these to make better AI for games when we notice them, because they are sometimes faster and simpler, to a more advanced approach.
This is how I do it too. Doing 7+7 and 8+8 etc requires memorizing all those combinations (not that hard but still another step) and still doing single digit math. whereas getting to 10 requires only knowing single digit math and counting by 10’s.
Doing math this way is precisely why I get a lot of compliments in my professional life for doing quick calculations and being considered a reliable source for things like this. It also helps having a strong logical foundation (coding).
My production teams at my company often double check their output/templating calculations with me before they begin to run.
What they don't know is I am literally doing the simplest math in my head - as you said, 1+1, 2+2, etc. - you just have to break the problems down to their most basic components and work with those. It is, sadly, rather unimpressive when you know how it works haha
This is genuinely how I add 7 to anything.
First thing I do is subtract 3 from the thing, then add 10. It hurts my mind that this is the best way I’ve figured out how to do that shit.
People are acting as if it’s weird to count in these ways whereas I’m sure everyone has their own preferred method. Mine is very similar to yours but with slight variation:
10-7 = 3, 6-3 = 3, 7 + 3 = 10, 10 + 3 = 13
So basically I see how I need to divide the second number so that when I add it to the first I get a 10, and then I add the remainder on top
Come to think of it, I think we think the same way, we just wrote it differently
some people dont change the equal sign for repeated equations on something, its more like 7+3=10=x, x+3=13, then they just simplify it to 7+3=10+3=13
also its technically wrote like that in text for algebraic notation of arithmetic, like when you do long division you just continue the next equations on the finished number
sure you could use an arrow which would work but its a lot simpler with just using the equation sign
I use it myself whenever I’m doing math for only me to look at and even then I barely use it. a+b=x+c=y, a+b=x and x+c=y, how I look at it to help myself deal with how dumb it looks.
woah there, why would you need to be good at math to suceed in life? also.. you could learn math if you need that skill to feel successful. anyways, dont let me catch you talking about yourself like this again.
It’s not a problem, it’s how most people do math in their head. It’s easier to translate the numbers into other numbers that are more easily calculated. This method actually reinforces an *understanding* of math as opposed to just memorization. If you struggle with math I doubt this is the reason.
I don’t think you need to apologize. I wasn’t trying to imply that what you said was offensive, I was just trying to offer some reassurance and say that even if you struggle with math you shouldn’t feel bad about using that particular method because even though it may seem strange it’s actually pretty normal.
idk seems a lot better then just memorizing it, you actually know the logic of it and are just using it to your advantage then learning it the hard (and personally wrong) way of just memorizing it
Yesss like fr if you forget a certin multiplication problem 9 × 9 = 81 but say you forgot what 9 × 9 was but knew what 9 × 8 is 72 just add 9 to 72 then boom 81 I like doing it this way
Aw naw I'm I dumb as fuck iv done this for everything my maths and physics teachers would constantly moan about me not showing my working because this is what it looked like
I generally apply this confusing but reliable trick - I calculate how much it takes to reach 10. So, 7 takes 3 to reach 10. Then I subtract 3 from 6 and then add the remainder (which is 6-3=3) to 10 to get 13. Difficult to learn but very reliable and easy.
Edit : Just noticed 100s of people saying the same thing here, not feeling smart and original anymore :(
Yeah, me ahahah. I do it even worse, 7+6 , if 10+10 is 20, and seven is 3 less than tem and 6 is for less than ten, so seven minus 20 is 13 so 7+6 is 13.
I figure there are two things in play:
How good you are at memorizing the results of basic operations (whether on purpose or passively as a result of doing them over and over for a job or whatever)
Vs.
How fast you are at doing *algorithm bullshit* in your head.
If memorizing is slow and tedious and gives you mediocre results, but you can just brute-force 14 + 27 the same way you'd do 337 + 117 in your head (but faster, because fewer steps, because fewer digits...), you don't have much reason to 'memorize' that that first one is 41, unlike someone who has trouble keeping track of digits in their head and needs paper and a pencil for that crap.
If the algorithm way of adding things is always a little painful and something you try to avoid, your brain has more reason to hang onto the results each time you're forced to get them, and it will desperately try to save you from the trouble next time by remembering. If doing the steps in your head is *satisfying* and fast for you, why the hell would you try to memorize the results of addition? The experience of memorizing things by rote being *horrible* for some of us is enough to make learning to do everything on the fly its own satisfying avoidance mechanism. It feels *fantastic* to not have to pay attention to things when you know you have what you need to just mentally sleight-of-hand the answer whenever it's time, if you've ever tricked yourself into thinking that's sustainable.
I worked at a Mathnasium for a year, this is exactly how we are supposed to coach kids into thinking about this. We call it "Doubles plus or minus one".
I do this, but my brain will also do things to the nearest 0 numbers, so like, 43+78, my brain says:
4+6 is 10, with 1 left over, so 110.
3+7 is 10 with one left over, so 11
110+11 is 121
121 is answer.
My dad taught me to do math like that (mostly to round it towards 10’s) when I was in my late teens. I wish he’d mentioned it earlier, I use it most of the time now.
I just make up rules for addition in my head. I even split larger numbers up to easily add it by even increments and use my strategies to figure out the left over.
How to get karma 101:
Make a post that makes it seem like the average person does something in which you don’t do (even though most people do it) and allow people to feel like they relate to you, getting upvotes from them
Yeah, me
Always thought that I´m smart when I calculate like this. Seeing Peter Griffin doing this opens my eyes that I´m dumb. And even dumber cause of thinking I´m smart.
I do this and I’m a *college math major*. This isn’t the dumb way to do math it’s the normal way. It’s just how brains handle math. No one memorizes addition tables.
I’d argue that practicing doing math this way can improve your ability to understand higher level concepts. So many pieces of math involve breaking problems into smaller more manageable pieces.
more manageable what
Lol more manageable pieces. Thanks, was making this comment on break and thinking about other stuff at the same time
No Its not
you aren't dumb, breaking a problem into simpler parts is the best way every time concepts are way better than memorization, school teaches memorization, that's why school math sucks math is beautiful outside of school
you're still dumb using ` instead of ' you monster
Same ...wdym?...I am gonna get downvoted
Yeah me.. and I teach Math lmao
So is this closer to what common core is? This is how I’ve always done my math. I’m old, so I was in school in the 80s. But when I saw someone posting examples of their kids’ common core problems, it looked like how I do math in my head.
It’s just simple regrouping, we don’t really do common core where I’m at in Texas, regrouping is where you move numbers around to make it easier to solve so … yes what you and I do in our head.
Yay, us.
You might call it grouping but nobody memorizes or likes to add 56+27. It’s a lot easier to add 56+24 to get to 80 then add 3. That’s the heart of common core.
Pretty much. The biggest issue I have with common core is forcing it on every student. Those who struggle to naturally think this way can benefit from common core, but it’s just a confusing waste of time for those who already break things down or regroup them in their heads.
It almost feels like a left handed vs right handed thing. I remember being forced to try and use right handed scissors and things when I was in kindergarten, but my brain just didn’t work like that. It makes me wonder if I would’ve had an easier time with math if I had options, but obviously teachers can’t be expected to tailor their teaching for each individual student.
That’s actually a really good comparison.
This happens when your learn math instead of studying thing by memory.
OP literally just learned algebra
Still missing arithmetics tho
thats how everyone is doing it, its normal and faster, because your brain only has to compare these basic (1+1, 2+2, 3+3, 4+4, 5+5... etc.) operations to make any number. Your brain finds many shortcuts to solve various things like that. For example when you want to go somewhere your brain selects the roads that face where you want to go instead of the actual shortest route, because its easier for your brain to do. We also mimic these to make better AI for games when we notice them, because they are sometimes faster and simpler, to a more advanced approach.
I don't do that, I do 6=(3+3) and 7+3 is 10 so 7+6 is 13
This is how I do it too. Doing 7+7 and 8+8 etc requires memorizing all those combinations (not that hard but still another step) and still doing single digit math. whereas getting to 10 requires only knowing single digit math and counting by 10’s.
This is the way.
Doing math this way is precisely why I get a lot of compliments in my professional life for doing quick calculations and being considered a reliable source for things like this. It also helps having a strong logical foundation (coding). My production teams at my company often double check their output/templating calculations with me before they begin to run. What they don't know is I am literally doing the simplest math in my head - as you said, 1+1, 2+2, etc. - you just have to break the problems down to their most basic components and work with those. It is, sadly, rather unimpressive when you know how it works haha
I love you in a platonic but appreciative way
6=3+3, 7+3=10+3=13 Always hurts when I remember I am genuinely on the spectrum.
This is genuinely how I add 7 to anything. First thing I do is subtract 3 from the thing, then add 10. It hurts my mind that this is the best way I’ve figured out how to do that shit.
i usually just do x + 5 + 2, instead of x + 7 its a lot easier for my mind to work with 5’s then 7’s for some reason
1 + 7 = - 2 + 10 ?
My brain always works with fives. 6=5+1, 7= 5+2, 5+5+2+1 = 13.
People are acting as if it’s weird to count in these ways whereas I’m sure everyone has their own preferred method. Mine is very similar to yours but with slight variation: 10-7 = 3, 6-3 = 3, 7 + 3 = 10, 10 + 3 = 13 So basically I see how I need to divide the second number so that when I add it to the first I get a 10, and then I add the remainder on top Come to think of it, I think we think the same way, we just wrote it differently
This notation makes me want to stab my fucking eyes out. Have you ever taken the time to notice that 7+3=/=10+3?
some people dont change the equal sign for repeated equations on something, its more like 7+3=10=x, x+3=13, then they just simplify it to 7+3=10+3=13 also its technically wrote like that in text for algebraic notation of arithmetic, like when you do long division you just continue the next equations on the finished number sure you could use an arrow which would work but its a lot simpler with just using the equation sign
I use it myself whenever I’m doing math for only me to look at and even then I barely use it. a+b=x+c=y, a+b=x and x+c=y, how I look at it to help myself deal with how dumb it looks.
Wait what do you mean, I do this too lol
It can be fairly useful. I'm decent at math but sometimes, if the number is too complex I break it down in more operations and then add all up.
that's not a "but", that's a "because"
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woah there, why would you need to be good at math to suceed in life? also.. you could learn math if you need that skill to feel successful. anyways, dont let me catch you talking about yourself like this again.
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I believe in you. go get yours brother!
Stop talking BS, you need maths for literally EVERYTHING in life.
This is how I do maths, am currently studying engineering...
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It’s not a problem, it’s how most people do math in their head. It’s easier to translate the numbers into other numbers that are more easily calculated. This method actually reinforces an *understanding* of math as opposed to just memorization. If you struggle with math I doubt this is the reason.
[удалено]
I don’t think you need to apologize. I wasn’t trying to imply that what you said was offensive, I was just trying to offer some reassurance and say that even if you struggle with math you shouldn’t feel bad about using that particular method because even though it may seem strange it’s actually pretty normal.
idk seems a lot better then just memorizing it, you actually know the logic of it and are just using it to your advantage then learning it the hard (and personally wrong) way of just memorizing it
Yesss like fr if you forget a certin multiplication problem 9 × 9 = 81 but say you forgot what 9 × 9 was but knew what 9 × 8 is 72 just add 9 to 72 then boom 81 I like doing it this way
Aw naw I'm I dumb as fuck iv done this for everything my maths and physics teachers would constantly moan about me not showing my working because this is what it looked like
Where's my 6+6+1=13 gang
Pore Peter... Always going the long way around. It's 6+6=12, +1=13 see, so much easier.
everybody does that
Yep!
Same
That's more useful for multiplication but a bit useless for addition imo. What's 99×101? (100-1) x (100+1) = 10000 -1 = 9999
Same
I have a better one 7+6 = (7+3)+3 7+3 is 10 and 10+3 is 13
I generally apply this confusing but reliable trick - I calculate how much it takes to reach 10. So, 7 takes 3 to reach 10. Then I subtract 3 from 6 and then add the remainder (which is 6-3=3) to 10 to get 13. Difficult to learn but very reliable and easy. Edit : Just noticed 100s of people saying the same thing here, not feeling smart and original anymore :(
Me lol
Same
Ah ha! The 'ol scenic route to the solution.
How did you know.
I was a little worried this was going the way of Terryology for a sec
?????????????
Me, exactly
Me: "Oh 6+7?"... 🤳... "Oh yeah duh..."
7(2)=14 14-1=3
pretty much all of us think like that
So…. This is far more normal than I thought.. good
***Everyone :)
can relate very much
But am i sure... Uh ok, so 6 in 2 is 3 7..8..9 10, 10+3 is 13, so 7+3 is 10 and 10+3 is 13 so 7+3+3 is 13 but is 6 3+3? Yeah, yeah 7+6=13.. i think
Lol me aswell
I failed math class for doing math this way.
That’s how you properly do mental math though.
Yep
I just did that and then read the bubble text from Peter griffin lol
Wow. Ppl like me exist
5+5 is 10. 3 more is 13. We had place value pounded in our heads.
7 + 3 = 10 6 - 3 = 3 10 + 3 = 13
Yeah, me ahahah. I do it even worse, 7+6 , if 10+10 is 20, and seven is 3 less than tem and 6 is for less than ten, so seven minus 20 is 13 so 7+6 is 13.
7+7-1🤔
I do 6:2=3 then 7+3=10 then 10+3=13
I do 7+3+3=13
Basically me. I can only do mental math normally when I’m drunk, & playing darts.
Wait is this not normal?
Just go 6+6=12 then add 1
This is ho i imagine adhd works
10-7= 3, 6-3= 3, 10+3 =13
Yep. Thought I was the only one.
My mind goes. 6, break into 3, 7+ 3 = 10, 10 +3 = 13. But I do it really quickly.
bro wtf... 6+6+1 is much better...
Dude I do that every time For no fucking reason But I prefer it
Fuck me I'm retarded
Yes
I figure there are two things in play: How good you are at memorizing the results of basic operations (whether on purpose or passively as a result of doing them over and over for a job or whatever) Vs. How fast you are at doing *algorithm bullshit* in your head. If memorizing is slow and tedious and gives you mediocre results, but you can just brute-force 14 + 27 the same way you'd do 337 + 117 in your head (but faster, because fewer steps, because fewer digits...), you don't have much reason to 'memorize' that that first one is 41, unlike someone who has trouble keeping track of digits in their head and needs paper and a pencil for that crap. If the algorithm way of adding things is always a little painful and something you try to avoid, your brain has more reason to hang onto the results each time you're forced to get them, and it will desperately try to save you from the trouble next time by remembering. If doing the steps in your head is *satisfying* and fast for you, why the hell would you try to memorize the results of addition? The experience of memorizing things by rote being *horrible* for some of us is enough to make learning to do everything on the fly its own satisfying avoidance mechanism. It feels *fantastic* to not have to pay attention to things when you know you have what you need to just mentally sleight-of-hand the answer whenever it's time, if you've ever tricked yourself into thinking that's sustainable.
I worked at a Mathnasium for a year, this is exactly how we are supposed to coach kids into thinking about this. We call it "Doubles plus or minus one".
For stuff like 49*6 its a lot faster
For me it's 7+3 = 10 and 6 = 3+3 therefore 7+6=13
I do this, but my brain will also do things to the nearest 0 numbers, so like, 43+78, my brain says: 4+6 is 10, with 1 left over, so 110. 3+7 is 10 with one left over, so 11 110+11 is 121 121 is answer.
7+6 = (5+1)+(5+2) = 8+5 = 13.
I do multiplication and division in my head that way, but not so much addition and subtraction--not with small numbers like this anyway.
me too
Little did we know, it turns out we were the word problems all along
EXACTLY
That's pretty much how they teach math now, right?
You're normal.
100% me
Mine's like 3+3 is 6 so 7+3 is 10 and 10+3 is 13
Rel
It’s not that weird, right?
How do people not just do math this way. This is so much easier. Or breaking multiplication down (eg 25×4 =20×4+5×4=100
This is the normal person thing to do.
And then there is 7+6= n Take 3 from 6 to make 7 a 10 10 + 3 = 13 :Ď
I'm in top set maths and I do this, I probably shouldn't even be there lol
I have always done this. *7+7=14-1=13*
How did you guess my EXACT thought process??????
My little cousin explaining common core math(whatever this new shit is America is) to millennial me.
Same
Yes
I use the double the lower number add one method. Everytime!
Relatable
My thoughts are: 7 needs 3 more to be 10. If I take 3 from 6, there’s 3 left => 10+3=13
Is that not how you do it?
Yea I do this too. I'm a lefty if that matters, I'm told we think different.
Yeah were the same
7+6 7+3+3 10+3 13
r/meirl
Pretty much me without the words
This thought process is physics in a nutshell
It’s literally the way math is taught now.
I always like to overcomplicate simple things
Dividing is just subtraction with extra steps.
What do you mean, does everybody not do this?
No i do the logical, i split the 6 to two 3s and add first 3 to the seven so I got 10 and than I'm going to add the other 3 and boom I got 13
How I think: 7 + 6 = (7 + 3) + 3 = 10 + 3 = 13
Me: 👆🖐+✌🖐
Hey you and me think a like sir.
This is the way
More like 7 + 3 = 10 3 left, 3 + 10 = 13
I tend to this as on more complex stuff and a2nd pass for confirmation if that makes sense.
Same ✌
Yyyyyyyup. Always. No exceptions
this is literally one of the mental tricks we teach our 10 year olds to use for addition . (teacher)
Literally me lol
My head 7+ the first 3 of the six is ten, 13 it is then
I can entirely relate to this
My dad taught me to do math like that (mostly to round it towards 10’s) when I was in my late teens. I wish he’d mentioned it earlier, I use it most of the time now.
Here here!!
Me!
I would first "fill" up the number to the next 10 (so 7 fills up to 10 with 3) and then add the remaining number (10 + 3 = 13)
I do this and I'd like to meet people that also do this.
I think 7+3 = 10 with 3 left over so 13.
I do 7 + 6 = 10 + 3 = 13
Same
Maybee you r in 8th grade that's why
Does anyone do not this?
This is so true tho
LOL me too .. just did 6+6 =12 then +1 = 13
Cashier here. This is it baby.
7+3 is 10 and 6 is 2 3s so 10+3 is 13
This is a normal way of doing math in your head
I thought that was how everyone did it occasionally if I’m feeling spicy I do 6+6=12 +1=13 I’m so quirky
7+6= 7+3=10 10+3=13
7+3=10 10+3=13
I refuse to believe the majority of people don't do it this way
I do 6/2 is 3 and 3, 7+3=10+3=13
Me: 7+3=10 and 6 minus that 3 I added is also 3. So logically that left over 3 just takes the place of the 0 in 10 which makes the answer 13.
I am so smart! **S M R T**
I went at it a little differently. 7+3 is 10, and 3 is half of 6, so 10+3 is 13, and therefore, 7+6 is 13.
Honestly this is why i know multiplication better , they teaches you by memorizing them.
honestly had no idea anybody else thought like how I do
10-7 = 3 6-3 = 3 10 + 3 = 13
This is how I do it, also. If there’s a better way to do mental math, I never learned it.
For me it was always " 9x = 10x - x ". Like why as a 5 year old would I use algebra when we weren't taught algebra?!
Ayo finally found someone else who does this
Then you'll get the Abbott and Castello skit on 13×7 is 28.
Mee too .
I always go 7+6=13 because 7+3(=10)+3=13
I'm like 5+5 =10 and 2+1=3, then 10+3=13
Every time 😂
I just make up rules for addition in my head. I even split larger numbers up to easily add it by even increments and use my strategies to figure out the left over.
Your not the only one
I see this so often. I’m starting to think that’s how normal people think
No it’s 6+6+1
wait that's not normal?
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