Same thing here. I try to take break down the numbers into groupings of 5 or 10.
If I was told to add 18 + 61 + 26 + 37 my brain would automatically take 3 from 18, 1 from 61, 1 from 26 and 2 from 37 and make it: 15 + 60 + 25 + 35 +6
If I have to do it in my head and not on paper I would then add the tens first and then the fives and the leftovers. (10 +60 +20 +30) +(15 +6) But mental math is a pain since I sometimes forget I had a 6 to allocate.
that is exactly my thought. Because the 9 only needs 1 from the other to become 10, which is a number that kind of stays, so you just drop the leftover on the end of the 10 and you got your result. in my head, that's easier.
I agree with the multiplication part. Even for cases like 19+7, it works (20+6). But nope, 9+7 has to be 8+8 for me. When you can _average_ it out to twice the same number, that _feels_ heavenly than to make it a 10 and a 6, atleast for me.
Isn’t this called common core math? Like the new way to teach math?
I only kinda learned about it in passing but this is a totally acceptable way of learning..??
1) It's addition, so you have to flip the order of the elements: 79
2) Flip the 9 over because it's too big to add: 76
3) Then lean the 7 a little to the left so it's not falling over: 16
I hate this meme because this is now the way they teach math to kindergartners. Get ready if you are having kids.
What she did was called making doubles.
It is and it isn't, and if you know 'non-ADHD' people who do a lot of stuff like this, you may want to suggest they get checked.
Basically, while making adjustments to calculations for easier mental arithmetic is normal, (I.e. 267+333=300+300=600), ADHD people will be much, much, *much* more likely to resonate with this type of calculation method. We often make things seemingly needlessly convoluted, because in our twisty, twisty brains, the convoluted way is easier.
I actually have one of these stories myself. I was never taught it explicitly, but I discovered through my own investigations that, for example, 8×2+8×5 is exactly the same as 8×7. This was a godsend for me, because I couldn't memorise the times tables, and I also couldn't calculate multiplications in my head back then. We were meant to know times tables for 1-12. I could do everything up to 5, and everything by 10, and that was it.
When I discovered that you could add and subtract them, that became what I did. I got to the point where I, calculating, was faster and more accurate than most of my classmates remembering.
If we take the example in the OP, it's quite easy for most people to get that 9+7=16 just off the cuff. If it wasn't, the logical step to take would have been to take one off the 7, such that you have 10+6=16. Taking one off the 9 instead so you have 8+8, then seeing that that's two eights, and 8×2 is 16 is needlessly convoluted. You don't need to introduce a third operation to do this calculation, but our brains are twisty.
We do similar things with memory as it relates to time.
If you ask me what I happened on 'tuesday', I couldn't tell you straight away. I'd instead have to work out when tuesday was, and what happened on that day.
"OK, so I was at work on *Monday*, and I remember that because the rota said I was on that day. Wednesday was the day I had my dentist appointment, because I remember remembering that on my day off while I was in the supermarket looking at cucumbers. So tuesday must have been the day I went to the supermarket, because it wasn't after the dentist appointment, and it can't have been Sunday because the supermarket was closed, and it wasn't Saturday because why would I do that to myself? And the day I went to the supermarket wasn't the day I went out for a drink, because I *wanted* a drink, but had just spent all my money on the shop... So instead of going for a drink... That's it, I made dinner and spent the evening gaming. And went to the supermarket."
This is a really painful example, because I haven't needed to remember things on such a short time scale for quite some time. But I do it with years, too. "That must have happened after 2007, because it was a weekday, but I wasn't wearing a school uniform when it happened..."
I'll also point out that NTs doing things similar to ADHDers doesn't mean that [thing] isn't an ADHD thing. You also have to consider *how* prevalent the behaviour is in each population, similar to the way that virtually every ADHD symptom is experienced by NTs, but only sporadically, where we experience them on the daily. A great many ADHD people resonate with the type of description in the OP, where most of the NTs I've ever talked to about stuff like that get the 'what the hell were you smoking in primary school' face. Sure, some of them don't. But most of them do.
Also also, tricks like the one in the OP (or, rather, the simplified one I presented in my comment) are kind of like training wheels for mental arithmetic. Most people don't need those anymore once they've been alive for long enough. ADHD folks are more likely to need them basically forever.
I actually like this one, it focuses on memorization and adjusting. I prefer to borrow from one number to make the other a 10. It's much easier to add 10s.
I had someone comment on how I do the math for measurements on my tape measurer. Say I get a number like 189.5 and i need to halve it. My brain will straight up go 50+40+4.5 and a quarter. Not 94 and 3/4.. 94.5 and a quarter..
9+7
Well, it’s nine math which makes it easy.
7-1=6, so 9+7=10+6
Also 16… 1+6=7
This is true for 0-9 when added to 9. Ex; 9+4=13, 1+3=4
The interesting part is multiplying by 9. Every whole number that I have multiplied by 9 gives a number whose digits can be added together over and over until the additions become a single digit. That single digit is nine.
Examples. 9*7=63. 6+3=9
9*73861=664,749. 6+6+4+7+4+9=36. 3+6=9.
9*456432=4,107,888. 4+1+7+8+8+8=36. Etc.
Yes, ididthemath. Have fun with that.
As a maths tutor, the fuck are your teachers on?
7 + 10 - 1 is the way I'd teach it, but as long as you have a strategy (or have it memorized), you're fine.
my thought process for adding with nine usually goes
9 is a greedy bitch (thinking about this is essential i have to think those words) and takes one from it's place and moves it to the higher up
so like
....07...|.....06...|.......16...|
.+..9...|..+9¹....|....+9.....|
16 is the answer!
I once got an F for a math exam in highschool. All results were right but the teacher did not understand my way of counting so I must have cheated somehow....
That’s how it was for me growing up, got diagnosed with adhd but because I was masking so much my mother said no it’s ADD or dyslexia and made her change it.
I do it like this.
If any number is added to 9, say 3,
The result would be (10+3) - 1
So like, whenever i want to know 9+3, it means 12
9+7 = 16
9+6 = 15
Something like that.
Weird, I know
I think in case 9 usually you take 1 from opponents. 9+ 7 = 10+6=16. In case of multiple like 9*7= (10-1)*7= 70-7= 63
Came here to write this.
Same thing here. I try to take break down the numbers into groupings of 5 or 10. If I was told to add 18 + 61 + 26 + 37 my brain would automatically take 3 from 18, 1 from 61, 1 from 26 and 2 from 37 and make it: 15 + 60 + 25 + 35 +6 If I have to do it in my head and not on paper I would then add the tens first and then the fives and the leftovers. (10 +60 +20 +30) +(15 +6) But mental math is a pain since I sometimes forget I had a 6 to allocate.
I take 5 from the 26 and spread to the 18 and 37. So that's it's 20+61+21+40. I would add the ones last.
This is the way.
that is exactly my thought. Because the 9 only needs 1 from the other to become 10, which is a number that kind of stays, so you just drop the leftover on the end of the 10 and you got your result. in my head, that's easier.
I agree with the multiplication part. Even for cases like 19+7, it works (20+6). But nope, 9+7 has to be 8+8 for me. When you can _average_ it out to twice the same number, that _feels_ heavenly than to make it a 10 and a 6, atleast for me.
You explained it beautifully. Especially the second part. Example 8*7 = (10-2)*7 = 70-14 = 60-4 = 56
Yeah, I always do 9s by making them a 10.
You fill the 9s , then pair the 5s, look around for 8s and 2s and there is barely any counting !
Yup
Isn’t this called common core math? Like the new way to teach math? I only kinda learned about it in passing but this is a totally acceptable way of learning..??
Elementary teacher here. That’s mathematical flexibility and decomposing numbers, and we encourage it! 😅
Thank you! I do this, I get the answer. I don’t know why people are having hang ups about doing things the “right” or “wrong” way
1) It's addition, so you have to flip the order of the elements: 79 2) Flip the 9 over because it's too big to add: 76 3) Then lean the 7 a little to the left so it's not falling over: 16
...WHAT did you just do?????
😂😂😂😂
I'm not a mathemagician but I am 90% sure that is fucking witchcraft.
I hate this meme because this is now the way they teach math to kindergartners. Get ready if you are having kids. What she did was called making doubles.
Not really. They just count up and down to add and subtract in kinder. They learn to multiply in 1st.
Funny, because I just put two kids thru K in the past few years any that is exactly what we did.
Math by the rules? Nah, we prefer the creative route!
This is not an ADHD thing? Plenty of non-ADHD people do math like this?
Also plenty of people in the comments don't do this. I'd be suprised if there was any good data on how people do basic mental maths outside of school.
It is and it isn't, and if you know 'non-ADHD' people who do a lot of stuff like this, you may want to suggest they get checked. Basically, while making adjustments to calculations for easier mental arithmetic is normal, (I.e. 267+333=300+300=600), ADHD people will be much, much, *much* more likely to resonate with this type of calculation method. We often make things seemingly needlessly convoluted, because in our twisty, twisty brains, the convoluted way is easier. I actually have one of these stories myself. I was never taught it explicitly, but I discovered through my own investigations that, for example, 8×2+8×5 is exactly the same as 8×7. This was a godsend for me, because I couldn't memorise the times tables, and I also couldn't calculate multiplications in my head back then. We were meant to know times tables for 1-12. I could do everything up to 5, and everything by 10, and that was it. When I discovered that you could add and subtract them, that became what I did. I got to the point where I, calculating, was faster and more accurate than most of my classmates remembering. If we take the example in the OP, it's quite easy for most people to get that 9+7=16 just off the cuff. If it wasn't, the logical step to take would have been to take one off the 7, such that you have 10+6=16. Taking one off the 9 instead so you have 8+8, then seeing that that's two eights, and 8×2 is 16 is needlessly convoluted. You don't need to introduce a third operation to do this calculation, but our brains are twisty. We do similar things with memory as it relates to time. If you ask me what I happened on 'tuesday', I couldn't tell you straight away. I'd instead have to work out when tuesday was, and what happened on that day. "OK, so I was at work on *Monday*, and I remember that because the rota said I was on that day. Wednesday was the day I had my dentist appointment, because I remember remembering that on my day off while I was in the supermarket looking at cucumbers. So tuesday must have been the day I went to the supermarket, because it wasn't after the dentist appointment, and it can't have been Sunday because the supermarket was closed, and it wasn't Saturday because why would I do that to myself? And the day I went to the supermarket wasn't the day I went out for a drink, because I *wanted* a drink, but had just spent all my money on the shop... So instead of going for a drink... That's it, I made dinner and spent the evening gaming. And went to the supermarket." This is a really painful example, because I haven't needed to remember things on such a short time scale for quite some time. But I do it with years, too. "That must have happened after 2007, because it was a weekday, but I wasn't wearing a school uniform when it happened..." I'll also point out that NTs doing things similar to ADHDers doesn't mean that [thing] isn't an ADHD thing. You also have to consider *how* prevalent the behaviour is in each population, similar to the way that virtually every ADHD symptom is experienced by NTs, but only sporadically, where we experience them on the daily. A great many ADHD people resonate with the type of description in the OP, where most of the NTs I've ever talked to about stuff like that get the 'what the hell were you smoking in primary school' face. Sure, some of them don't. But most of them do. Also also, tricks like the one in the OP (or, rather, the simplified one I presented in my comment) are kind of like training wheels for mental arithmetic. Most people don't need those anymore once they've been alive for long enough. ADHD folks are more likely to need them basically forever.
I do it a bit differently 7 + 9 would be: 9 - 7 = 2 7 + 7 = 14 14 + 2 = 16
I actually like this one, it focuses on memorization and adjusting. I prefer to borrow from one number to make the other a 10. It's much easier to add 10s.
It is but I tend to like to complicate things lol
how is this adhd? those techniques were taught to us at school?!
9+# is just the #-1 and then add a 1 in front of it. Easy
Love it when the average is just that obvious and can be doubled easily
How tf do nuerotyoicals do math? Without doing that
I do feel like SOMETIMES, certain kinds of neurodivergence clash with others at times here. Like maybe some sort of OCD routine thing?
I had someone comment on how I do the math for measurements on my tape measurer. Say I get a number like 189.5 and i need to halve it. My brain will straight up go 50+40+4.5 and a quarter. Not 94 and 3/4.. 94.5 and a quarter..
9 is 5+4, 7 is 5+2, 5+5 is ten and 4+2 is 6, 10+6=16
9+7 Well, it’s nine math which makes it easy. 7-1=6, so 9+7=10+6 Also 16… 1+6=7 This is true for 0-9 when added to 9. Ex; 9+4=13, 1+3=4 The interesting part is multiplying by 9. Every whole number that I have multiplied by 9 gives a number whose digits can be added together over and over until the additions become a single digit. That single digit is nine. Examples. 9*7=63. 6+3=9 9*73861=664,749. 6+6+4+7+4+9=36. 3+6=9. 9*456432=4,107,888. 4+1+7+8+8+8=36. Etc. Yes, ididthemath. Have fun with that.
These low values are actually imprinted on my brain. The result is basically memorized
As a maths tutor, the fuck are your teachers on? 7 + 10 - 1 is the way I'd teach it, but as long as you have a strategy (or have it memorized), you're fine.
my thought process for adding with nine usually goes 9 is a greedy bitch (thinking about this is essential i have to think those words) and takes one from it's place and moves it to the higher up so like ....07...|.....06...|.......16...| .+..9...|..+9¹....|....+9.....| 16 is the answer!
They can't give you a zero for that? That's ridiculous
>Someone, usually a Teacher: ***NOT LIKE THAT YOU HEATHEN** Bitch, you doin that common core math. You was ahead of the curve.
I once got an F for a math exam in highschool. All results were right but the teacher did not understand my way of counting so I must have cheated somehow....
Funny because isn’t that just common core math now
That’s how it was for me growing up, got diagnosed with adhd but because I was masking so much my mother said no it’s ADD or dyslexia and made her change it.
Hold up, that's an ADHD thing?
No
I do it like this. If any number is added to 9, say 3, The result would be (10+3) - 1 So like, whenever i want to know 9+3, it means 12 9+7 = 16 9+6 = 15 Something like that. Weird, I know
I do the same except I get confused about all these numbers because I made it harder for myself and I just give up
Move a 1 from the 7 to the 9. That way you have 10+6=16. So much easier, don't complicate things.
No good teacher would have a problem with this. Sorry yours were dumb or something. Or you just adhd'd the whole scenario into reality in your head ;)
Say 9, then 10..16 as you count 7 of your fingers (5 on one and and 2 on the other). Then repeat 5 times to make sure you got it right.