#mental arithmetic
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kithpendragon · 1 year ago
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Similar: 20+40 = 60 feels like one step to me, counting by tens from 40 7+8 is a memorized 15 15+60 = 75 feels like one step too
I spent too much time in math classes refusing to show my work, and had to be able to finish very quickly when asked to prove I wasn't using a calculator. I've lost much of that ability due to lack of practice in the intervening decades. There might still be some intermediate steps going on in the background, but I'm not conscious of them.
I was taught to "carry the one" for this kind of addition, but this way is both faster and has fewer moving parts.
... looking for the double-check, I also see a different grouping:
27+3 = 30, 48+2 = 50 30+50 = 80 80 - (3+2 = 5) = 75
, but it's apparently not my go-to method in this instance.
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jacoburangite-blog · 8 months ago
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utaitemusic · 1 year ago
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【鏡音リンレン】メンタルアリスメティック【木弟子 / MV】
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mistakenlyfoundnico · 1 year ago
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we are five days into the new year and i have already read a total of 85 fics, that is 17 fics a day, however most only range from 3000-10,000, to anyone reading this you might be thinking damn this person most have a lot of free time, i have convinced myself that i can stay up an hour later than the night before for the last three nights so i am getting roughly 5 hours of sleep a night so i can read superbat and batfam fics
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boyjoan · 18 days ago
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desperately trying to instill new values in young girls who have obviously been raised to value prettiness over anything else
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dangerliesbeforeyou · 1 year ago
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relate HEAVILY to phil using his fingers to count lol
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linfernomio · 10 months ago
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at the tender and bright age of 14-15 my #1 dream was going to heaven and curb-stomping my guardian angel. like this isn't a joke every night i fell asleep angrily imagining this scene in detail. at the same time i got really into christianity and hoped that heaven exists dreaming that i will get there and start a kill-spree
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castielsharp · 1 year ago
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the cruelest thing fate has done to me, by far, is giving me a preschooler who's obsessed with maths.
I'm dyscalculic.
and all day it's
"mum, what's 7x5?" "mum, what's 50 + 60 + 3 + 2?" "mum, what does this symbol mean on the calculator?" "what's a square root?"
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machidonschool · 1 year ago
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songofwizardry · 1 year ago
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I say I have a physics degree but the amount of basic maths I manage to mess up on like. A weekly basis. Truly is astounding.
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alohamathmind · 1 year ago
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kikodora · 2 years ago
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ALOHA Philippines Makes Kids Masters of Mental Math
Many people all over the world dread mathematics. However, mathematics is very important in our lives that is why it is a primary component of entrance exams, along with Math and English. What if I tell you that for as short as two-hour sessions a week, your kids could be the masters of arithmetic and perform calculations with ease in their heads? ALOHA (Abacus Learning of Higher Arithmetic)…
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nonbinary-sticks-the-badger · 8 months ago
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jokes on you you now how to do basic arithmetic and i dont
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5k notes and i read all of archie
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elodieunderglass · 3 months ago
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does Killie manage to be a flat-and-jumps jockey all the way up to retirement/greyuncle era, or does injury (and Derek) force him to find some other occupation in between the two? fascinated to know what the second-choice job would be since jockey is so much what Killie IS
(Killie the jockey OC)
I don’t actually know! You’re very right! I have no idea!
The average retirement age for a flat jockey is 31 and jump is 33. Of this, the tough little lightweight jockeys, mostly of the previous era when people were smaller, seem to keep going for much longer than you’d think, many riding well into their fifties - which is actually quite old for any athlete. There seems to be a relationship between generational jockeys and longer careers/older retirements, too, though that’s probably combinations of family support, as well as possibly passing down the especially wiry/muscular builds that do a bit better in the context. It’s a topic that gets danced around a bit, but it’s known that being more muscular and better fed, with better bone health, means you can take more damage and bounce back faster. Also, jockeys frequently retire in their late twenties without injury or being forced, because they’ve achieved their natural adult size and it simply becomes incompatible with the job. So shorter ones do seem to last longer in the job; and as a bonus, turn into those wonderfully wiry little tiny old people that stump around the place in big boots and giant coats, muttering about their allotments. Killie is set up to be one of those.
I want him to be forcibly retired, though, and I DON’T want him to go the predicted trajectory of training racehorses OR raising another generation. Even though I find it a personal Special Interest and highly absorbing, it is such an incredibly STUPID sport. I think he’ll get dragged out of it by Derek by the scruff of his neck and maybe simply kept as a Kept Man. And there might be an interesting story to explore there in itself. Who the HELL is Killie without his job? (Crisis.)
We know he’s patient and kind with children, good at nature, excellent at mental arithmetic, and somehow ends up strangely wealthy (they’d probably settle in the UK, where keeping horses in the UK is NO cheap hobby.) maybe he simply earns and saves a true fortune of prize money, from tackling a career’s worth of astronomical purses, and retires honestly to be a surprisingly pleasant house-husband.
I think @eldriwolf has fond memories of a retired jockey who was a kind and patient beekeeper and science educator. Maybe he could do that. Maybe as a nod to Tark, Diana Wynne Jones’s retired jockey, and my own interests/hobbies, he could get violently competitive about village fetes/allotment shows, and enter his increasingly serious show tomatoes or something. Killie with his own Jam Saga going on, silently fighting psychic battles with his many enemies at parish council meetings that Derek drags him to because they’re doing their Civic Duty 😌 and Killie’s having a full wizard fight on the astral plane with That Bitch Agatha-who-strategically-shoved-his-Victoria-sponge-cake-off-the-table.
Who knows!! What do you think?
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machidonschool · 1 year ago
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peachdoxie · 6 months ago
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Welp, it was actually just more testing, not the results. I'll get those in January. The only piece of feedback I got today is that I'm good at mental math lol.
Tomorrow morning is the follow-up to my psych testing last week, which may or may not involve additional testing and/or results. I hope I can at least get some diagnosis that might help me get access to resources that can help me, because I'm running out of options.
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