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favorite math?
addition
subtraction
multiplication
division
I use the term "maths" like some imbecile
View Results
  • Locked thread
buglord
Jul 31, 2010



Buglord

so most of us are used to multiplying like this on the left, but apparently they're teaching kids multiplication with cubes and stuff?

what in the world is any of this weird stuff


and then my coworker says the Chinese use a super different way to multiply and it looks like pickup sticks which is a game i never learned how to play anyway?


maybe you weird STEM goons knew this all along and im the idiot, after all I majored in what was basically woke underwater basketweaving.

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TurboFlamingChicken
Sep 13, 2007

BIRB IS THE WIRB

When you get to middle school let us know how they teach different

Ort
Jul 2, 2005


Box method is always how I do math in my head, heck yeah teach kids that I just had to figure it out on my own.

Applewhite
Aug 16, 2014

IN THE GRIM BARKNESS
OF THE FUTURE
THERE ARE ONLY DOGS


Nap Ghost

Common Core is ruining our children and making them autistic so drug companies can sell more ADD meds.

let it mellow
Jun 1, 2000



Dinosaur Gum

yeah 7x23 is 7x20 + 7x3 but imo teaching the boxes thing doesnít teach u to learn that on ur own

idk I learned the old way and then one day I learned in algebra or sex Ed or something how things worked and then I saw the easy mental way to do math

EorayMel
May 29, 2015

You got the fluffy kitty kitty!

lol @ any math that is not tonal.

Jon Joe
Oct 19, 2011

HELP! I'VE FAILED AND I CAN'T SUBMIT


Grimey Drawer

That box method is the obvious way to do maths quicker? Heck, if you donít already have the value memorized you can go even faster by multiplying it in values of 10 and adding e.g. 23x7 becomes 70+70+21=161

BONE DOG
Jun 7, 2009

No shirt, no coat
Take me on a flat boat
Dover down to Covington
Covington to Louisville
Louisville to Henderson
Henderson to Smithland
Smithland to Memphis
Memphis down to Vicksburg
Vicksburg to Natchez
Going down to Natchez
Take me on a flat boat
Dover Dam to Covington
Covington to Louisville


Give the kids calculators why clog your brain with tedious bullshit with no real world application

buglord
Jul 31, 2010



Buglord

Jon Joe posted:

That box method is the obvious way to do maths quicker? Heck, if you donít already have the value memorized you can go even faster by multiplying it in values of 10 and adding e.g. 23x7 becomes 70+70+21=161

look theres only one vote submitted in my poll and I have every reason to believe its you who voted incorrectly.

I remember having to do timed tests where we had to know all our values up to 12x12. Its weird how useful that is to this day. We had to learn it to a math themed country music song.

Jon Joe
Oct 19, 2011

HELP! I'VE FAILED AND I CAN'T SUBMIT


Grimey Drawer

59 x 27 is 500 + 500 + 350 + 90 + 90 + 63 = 1593, easy

Jon Joe
Oct 19, 2011

HELP! I'VE FAILED AND I CAN'T SUBMIT


Grimey Drawer

buglord posted:

look theres only one vote submitted in my poll and I have every reason to believe its you who voted incorrectly.

I remember having to do timed tests where we had to know all our values up to 12x12. Its weird how useful that is to this day. We had to learn it to a math themed country music song.

Who the gently caress votes in polls

Xaris
Jul 25, 2006



Ort posted:

Box method is always how I do math in my head, heck yeah teach kids that I just had to figure it out on my own.

I wasn't taught it in elementary school but thats what I ended up doing and everyone thought i was super smart because i could do all that poo poo quickly instead of dumb rear end longform carry the fuckwhatever method. also did something with subtractions just to round up then subtract the added since subtracting multiple of 10s was ez


jokes on them tho, im dumb as a loving rock

appropriatemetaphor
Jan 26, 2006



They shouldn't teach kids anything, they're only around to replace us.

jimmyjams
Jan 10, 2001


i always wondered if other countries do better in math cause their questions are all based on 10s and they dont have to waste a ton of loving time converting inches to feet to miles or gallons to quarts to pints to ounces etc etc

jimmyjams
Jan 10, 2001


like what is a quarter of a kilometer in meters vs what is a quarter of a mile in feet

Over There
Jun 28, 2013



no goku voted 1

Cubone
May 26, 2011

Because it never leaves its bedroom, no one has ever seen this poster's real face.

Yams Fan

Ort posted:

Box method is always how I do math in my head, heck yeah teach kids that I just had to figure it out on my own.


let it mellow posted:

yeah 7x23 is 7x20 + 7x3 but imo teaching the boxes thing doesn’t teach u to learn that on ur own

idk I learned the old way and then one day I learned in algebra or sex Ed or something how things worked and then I saw the easy mental way to do math


Jon Joe posted:

That box method is the obvious way to do maths quicker? Heck, if you don’t already have the value memorized you can go even faster by multiplying it in values of 10 and adding e.g. 23x7 becomes 70+70+21=161

what these guys said, even though they disagree a little bit

I didn't learn the box method but it's... closer to what's actually going on?
like, the tens place, represents an amount of tens, so with ones it makes tens, with other tens it makes hundreds
carrying/displacing is a functional abstraction of that and I'm glad I know it but I could see why they would think removing the abstraction would make it more intuitive for young learners, and I could also see why adults who learned the other way would have trouble with it and how that might cause problems for parents, and I could also see why people might be concerned it would prevent children from making the leap to the less abstract meaning for themselves

which isn't to say I don't have an opinion, my opinion is I really, REALLY hope they experimentally tried this out on a small amount of children and it was proven to be effective under rigorous scrutiny
like as opposed to just some loving cabesa grande managed to talk some dummies in positions of power into upending the existing standards because it just seems like a good idea BECAUSE THERE ARE THINGS HUMAN BEINGS MISS AND YOU HAVE TO BE REALLY CAREFUL BEFORE CHANGING SOMETHING THAT WORKS

Grape
Nov 16, 2017

This avatar helped buy Lowtax a new neck.


buglord posted:

so most of us are used to multiplying like this on the left, but apparently they're teaching kids multiplication with cubes and stuff?

what in the world is any of this weird stuff



I'm complete poo poo at math, and if you actually look at those for two seconds it isn't really all that nuts dude.

Actually seems kinda nice. The first one anyway. Makes it super visual, always a plus for non STEM people.

GRINDCORE MEGGIDO
Aug 22, 2004

blub

UK primary schools taught the box method for multiplying like 35 years ago, how were you taught to multiply in the US in primary school?

GRINDCORE MEGGIDO fucked around with this message at May 16, 2018 around 02:15

Dogmeat
Jun 20, 2003


Woof!



Bread Liar

buglord posted:

I remember having to do timed tests where we had to know all our values up to 12x12. Its weird how useful that is to this day. We had to learn it to a math themed country music song.

they still do this too, a quick glance at the lattice method shows you itís a way to multiply larger numbers, but you still need to know your times tables through 9.

your friend a dog
Nov 2, 2016
I AM A DISGRACEFUL COWARDLY SWORDSMAN WITH NO SENSE OF HONOR OR RIGHT AND WRONG. EVERY DAY I LIVE IN GREAT SHAME FOR MY SINS.

i guess long form might be harder if you were stupid and didnt know how to multiply or something? idk

reignofevil
Nov 7, 2008


I think we should teach kids by putting them in the high profile world of hedge fund trading

OldAlias
Nov 2, 2013

I COULDN'T EVEN PLAY ONE TURN OF THE YOSPOS SMAC PBEM GAME AND ALL I GOT WAS A NERVE STAPLING AND THIS SHITTY TEXT!


this poo poo is bait. just donít penalize students for coming across a correct solution, whatever it is. teachers missing the forest for the trees poisons a lot of minds off math and makes people think theyíre bad at it, but thatís a fake idea, itís a failure of pedagogy

Cubone
May 26, 2011

Because it never leaves its bedroom, no one has ever seen this poster's real face.

Yams Fan

Dogmeat posted:

they still do this too, a quick glance at the lattice method shows you itís a way to multiply larger numbers, but you still need to know your times tables through 9.

I feel like I've seen some weird poo poo where they were like
what's 5 x 8?
well, think of it this way,: 5 8's is a lot like 5 10's, which is 50, and 10 minus 8 is 2, and 2 times 5 is 10, and 50 minus 10 is 40
so 40!

and some facebook dad was like WHAT. WHAT THE gently caress? WHAT.

Big Beef City
Aug 15, 2013

If you have a tiny dog you should be arrested and the dog placed on a tiny dog rocket and fired into the sun!!!

Ramrod XTreme

I'm not saying that either the fundamentalist understanding of mathematics is wrong.
It's been far too long for me to have an even child's grasp on this.

I do remember my math, algebra, and tire fire calculas fire lessons, however. And I do NOT hate math. I admit that I'm an idiot. And now being told that I'm an idiot that should maybe have neat cubes and stuff before I ever even got to "You're a loving idiot you loving child? Idiot moron durrr?" When I was already past that and math geeks were beating me up...

GRINDCORE MEGGIDO
Aug 22, 2004

blub

your friend a dog posted:

i guess long form might be harder if you were multiplying 10 digit numbers in primary school

Flambeau
Aug 5, 2015


Plaster Town Cop

Hey OP, let's add a mattress, subtract our clothes, divide your legs, and multiply!

Elukka
Feb 17, 2011



I'm absolute poo poo at doing math in my head. I whip out a calculator at the slightest provocation. All of these methods though are really just algorithms for doing the same thing that you can memorize if you need the ability to do math fast in your head for whatever reason.

Guy Mann
Mar 28, 2016
Probation
Can't post for 9 days!


https://en.wikipedia.org/wiki/New_Math

The way you learned math was once scary and new too, sorry you're too stupid and set in the old ways to adapt to newer better things.

satanic splash-back
Jan 28, 2009



Lattice method requires fewer steps and little kids have a hard time remembering directions longer than 2-3 steps. This is backed by some research and stuff.

your friend a dog
Nov 2, 2016
I AM A DISGRACEFUL COWARDLY SWORDSMAN WITH NO SENSE OF HONOR OR RIGHT AND WRONG. EVERY DAY I LIVE IN GREAT SHAME FOR MY SINS.

long form is literally like three steps.

step 1: multiple the first number on the bottom row with the top numbers.
step 2: add a 0 at the start for every number coming next and do as before
step 3: add them together

Vakal
May 11, 2008



I credit my TI-83 graphing calculator to my graduation of high school and college because I found out I could use its built in equation writing tool like a primitive note pad software to make cheat sheet for exams.

Former DILF
Jul 13, 2017
Probation
Can't post for 47 minutes!


Guy Mann posted:

https://en.wikipedia.org/wiki/New_Math

The way you learned math was once scary and new too, sorry you're too stupid and set in the old ways to adapt to newer better things.


here's a funny song about that from the 1960s
https://www.youtube.com/watch?v=UIKGV2cTgqA

your friend a dog
Nov 2, 2016
I AM A DISGRACEFUL COWARDLY SWORDSMAN WITH NO SENSE OF HONOR OR RIGHT AND WRONG. EVERY DAY I LIVE IN GREAT SHAME FOR MY SINS.

Vakal posted:

I credit my TI-83 graphing calculator to my graduation of high school and college because I found out I could use its built in equation writing tool like a primitive note pad software to make cheat sheet for exams.

hell yeah

Nessus
Dec 22, 2003

I still can't believe they cast Spock as me. Spock! Can you imagine?

Of course, he was missing a few things.

OldAlias posted:

this poo poo is bait. just donít penalize students for coming across a correct solution, whatever it is. teachers missing the forest for the trees poisons a lot of minds off math and makes people think theyíre bad at it, but thatís a fake idea, itís a failure of pedagogy
I got points off because my dad taught me some poo poo he learned in the New York public schools for simple algebra equations, which he was able to explain to me better than some idiot in Texas as he was my father and had extended 1 on 1 time. Anyway, I got the right answer but the process was wrong, so half credit.

Blue Train
Jun 17, 2012


Ort posted:

Box method is always how I do math in my head, heck yeah teach kids that I just had to figure it out on my own.

same

Cubone
May 26, 2011

Because it never leaves its bedroom, no one has ever seen this poster's real face.

Yams Fan

didn't they try a new math between New Math and Common Core?

I'm pretty sure there was an episode of the cosby show where one of the kids was doing math in base 12, and bill cosby was like humpty-dooooo this is all a bit much for me

Pawn 17
Dec 17, 2000

> access main security grid
access: PERMISSION DENIED.





Grimey Drawer

Cubone posted:

I feel like I've seen some weird poo poo where they were like
what's 5 x 8?
well, think of it this way,: 5 8's is a lot like 5 10's, which is 50, and 10 minus 8 is 2, and 2 times 5 is 10, and 50 minus 10 is 40
so 40!

and some facebook dad was like WHAT. WHAT THE gently caress? WHAT.

This kind of thing is useful for doing math in your head that goes beyond times tables. So for example you could break 15x15 down into 15x10 which is easy and then just add 15x5, which you could further break down into 10x5 plus 5x5.

super sweet best pal
Nov 18, 2009

No need to sign, we'll take care of that.


Lipstick Apathy


Aren't those basically the same thing written differently?

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Dogmeat
Jun 20, 2003


Woof!



Bread Liar

Cubone posted:

I feel like I've seen some weird poo poo where they were like
what's 5 x 8?
well, think of it this way,: 5 8's is a lot like 5 10's, which is 50, and 10 minus 8 is 2, and 2 times 5 is 10, and 50 minus 10 is 40
so 40!

and some facebook dad was like WHAT. WHAT THE gently caress? WHAT.

yeah that's a great example of why it's bad to just teach the method without any understanding. It's really useful but some guys who I suppose only learned long form can't handle a little subtraction in a multiplication problem or something.

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