
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.

# ? May 16, 2018 01:44 


# ? Nov 14, 2018 00:30 

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

# ? May 16, 2018 01:45 

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.

# ? May 16, 2018 01:46 

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

# ? May 16, 2018 01:46 

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

# ? May 16, 2018 01:48 

lol @ any math that is not tonal.

# ? May 16, 2018 01:48 

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

# ? May 16, 2018 01:48 

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

# ? May 16, 2018 01:49 

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 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.

# ? May 16, 2018 01:51 

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

# ? May 16, 2018 01:52 

buglord posted:look theres only one vote submitted in my poll and I have every reason to believe its you who voted incorrectly. Who the gently caress votes in polls

# ? May 16, 2018 01:53 

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

# ? May 16, 2018 01:54 

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

# ? May 16, 2018 01:56 

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

# ? May 16, 2018 01:58 

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

# ? May 16, 2018 02:01 

no goku voted 1

# ? May 16, 2018 02:01 

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 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

# ? May 16, 2018 02:02 

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? 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.

# ? May 16, 2018 02:02 

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 
# ? May 16, 2018 02:03 

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 it’s a way to multiply larger numbers, but you still need to know your times tables through 9.

# ? May 16, 2018 02:03 

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

# ? May 16, 2018 02:04 

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

# ? May 16, 2018 02:05 

this poo poo is bait. just don’t 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 they’re bad at it, but that’s a fake idea, it’s a failure of pedagogy

# ? May 16, 2018 02:07 

Dogmeat posted:they still do this too, a quick glance at the lattice method shows you it’s 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.

# ? May 16, 2018 02:10 

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...

# ? May 16, 2018 02:10 

your friend a dog posted:i guess long form might be harder if you were multiplying 10 digit numbers in primary school

# ? May 16, 2018 02:11 

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

# ? May 16, 2018 02:12 

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.

# ? May 16, 2018 02:12 

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.

# ? May 16, 2018 02:13 

Lattice method requires fewer steps and little kids have a hard time remembering directions longer than 23 steps. This is backed by some research and stuff.

# ? May 16, 2018 02:14 

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

# ? May 16, 2018 02:15 

I credit my TI83 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.

# ? May 16, 2018 02:15 

Guy Mann posted:https://en.wikipedia.org/wiki/New_Math here's a funny song about that from the 1960s https://www.youtube.com/watch?v=UIKGV2cTgqA

# ? May 16, 2018 02:15 

Vakal posted:I credit my TI83 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

# ? May 16, 2018 02:16 

OldAlias posted:this poo poo is bait. just don’t 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 they’re bad at it, but that’s a fake idea, it’s a failure of pedagogy

# ? May 16, 2018 02:22 

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

# ? May 16, 2018 02:23 

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 humptydooooo this is all a bit much for me

# ? May 16, 2018 02:24 

Cubone posted:I feel like I've seen some weird poo poo where they were like 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.

# ? May 16, 2018 02:27 

Aren't those basically the same thing written differently?

# ? May 16, 2018 02:28 


# ? Nov 14, 2018 00:30 

Cubone posted:I feel like I've seen some weird poo poo where they were like 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.

# ? May 16, 2018 02:29 