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/sci/ - Science & Math

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7139275 No.7139275 [Reply] [Original]

I don't understand how does this make any sense??

>> No.7139285

>>7139275
They they want

8+5 = 8+(2+3) = (8+2)+3 = 10+3

or

8+5 = 13 => (8+5)-3 = 10

?

>> No.7139287

This makes no sense to me, but then again I wasn't educated with this system when I was a child.

>> No.7139290

>>7139275
Who says it does? Also, you write like a 5 yo

>> No.7139291

Is this what they are teaching kids now a days? no wonder we are fucking at the bottom in terms of math and science compared to the rest of the world.

>> No.7139299

>>7139275
>Tell how to make...
Troll Elementary School?

>> No.7139307

>>7139275

They aren't asking the quesiton that you think. The teacher is asking how to manipulate numbers to make 10.

I can kinda see how this system is better than the way we learned while growing up. We were taught how to memorize algorithms (which is why everyone was so shit at world problems), which is terrible for actually understanding math. Give a man a fish and all that. Make kids think about how every operation works then they should be able to better analyze math problems.

>> No.7139329

Math for nignogs. Basically convert everything to finger counting exercises in hopes that they'll know how to count by the time they graduate high school.

>> No.7139340

>>7139287
>>7139291
>>7139329
please god let this be that one guy who does all the shitposting on this board

id rather him than a world of retards

>> No.7139350

>>7139307
>manipulate numbers to make 10

wut.

>"Show how to make 12 when adding 15 and 88"
>"Take 9 from the 15 to get 6, divide 88 by 11 and subtract 4 to get 4. Add the 6 and the 4 to get 10"
>"OMG SO NEXT LVL THIS IS THE FUTURE OF MATH EDUCATION QUICK GET THIS KID A DRY ERASE MARKER AND FIND A WINDOW HOLY SHIT"

All I can see is that if this is in fact some new type of teaching, it teaches children to ignore the boundaries/constraints of a problem. But some sperg is going to make the argument that this is somehow preparing them to think in 15 dimensions and to do pure math where the only constraint is your imaaaaaagination.

>> No.7139356

This doesn't make any sense

>> No.7139360
File: 79 KB, 502x503, userious.jpg [View same] [iqdb] [saucenao] [google]
7139360

>>7139340
lol butthurt 1st grade teacher detected

>> No.7139388

Let's use common core to solve 698+124, /sci/!

6+1 = 7, 9+2 = 9+1+1 = 10+1 = 11, 8+4 = 8+2+2 = 10+2 = 12, 7 is in the hundreds so 700, 11 is in the tens so 110, and 12 is in the ones so 12, giving 700+110+12, 7+1 = 8, 0+1+1 = 2, 0+0+2 = 2, 8 is in the hundreds so 800, 2 is in the tens so 20, and 2 is in the ones so 2, 800+20+2 = 822. We did it!

Math is so fun!

>> No.7139390

>Tell how to have 10 after you've added 8 and 5
The question is worded retardedly

>> No.7139393
File: 41 KB, 562x437, wow.jpg [View same] [iqdb] [saucenao] [google]
7139393

>>7139275
>mfw /pol/ think common core is a single method for teaching addition and constantly posts the same thread over and over again
>mfw /pol/ is retarded

>> No.7139405

>>7139350
Holy shit how fucking jealous of Barnett are you

>> No.7139421

>>7139275
>Tell how to make 10 when adding 8 + 5.
Nigga do you even English? Do you even math?

>Take 2 from 5 and add it to 8 (8+2 = 10) Then add 3.
To make a number from two numbers just take two different numbers and add them together then add the third number durr.

No, seriously, this textbook is a fucking crime against humanity, and the teacher is a reterd for not recognizing that.

>> No.7139426

>>7139388
What is this trickery? I've never seen such a convoluted method.

>> No.7139435

>teaching students how to think about math instead of just teaching them math
It's like these school districts are run by the type of morons who always fall for get rich quick schemes, except they think they're going to land on some miracle learning method that suddenly makes every child a genius

I'm just so grateful that I was an extremely stubborn child. I remember teachers wanting to force my class to use some stupid logic square thing on every question on a standardized test.
I never did it and they would always get pissed at me on the practice exams (yes, they were obviously teaching the entire curriculum TO the test), but I still got top scores on the test and probably finished in a 4th of the time as the other sheep in the class who went along with that dumb gimmick

>> No.7139444

>>7139291
>tfw they were trying to fix out low ranking with this

>> No.7139601

>>7139275
It doesnt make any sense. It is poor English and poor math. "Use 8 and 5 to make 10" is the most basic English reduction, but thats piss poor.
Use of the word tell (a narrative) verb is misleading in this context.

>> No.7139605

>>7139285
The first one I think.
Regardless, this is a meta-autistic way to teach math. It makes me cry

>> No.7139609

>>7139285
They must mean to use base 13.

Then you can definitely get 10 from 8+5, but it's poor form of them to expect kids to do that.

>> No.7139694

I don't see any problems with this.

8+5=8+(2+3)=10+3=13 is how normal people add.

There are still alot of people leaving school not knowing basic arithmetic like this, believe it or not. Needs to be extremely explicit. Remember, 50% of the population have IQ less than 100.

>> No.7139702

>>7139275
Makes sense if you're teaching at an elementary school. Otherwise, no sense.

>> No.7139704

>>7139275
>I don't understand how does this make any sense??

((8+5)-((8+5)%10)) = 1

There is 1 ten in 8+5

>> No.7139706

>>7139388
Makes perfect sense. But where is the 123???

>> No.7139707

>>7139291
>Is this what they are teaching kids now a days? no wonder we are fucking at the bottom in terms of math and science compared to the rest of the world.

>Teaching kids about Modulus early

>Sign that we're falling behind

>>>/out/

>> No.7139722

>>7139388
>Let's use common core to solve 698+124, /sci/!
>6+1 = 7, 9+2 = 9+1+1 = 10+1 = 11, 8+4 = 8+2+2 = 10+2 = 12, 7 is in the hundreds so 700, 11 is in the tens so 110, and 12 is in the ones so 12, giving 700+110+12, 7+1 = 8, 0+1+1 = 2, 0+0+2 = 2, 8 is in the hundreds so 800, 2 is in the tens so 20, and 2 is in the ones so 2, 800+20+2 = 822. We did it!
>Math is so fun!

>Let's use common core to solve 698+124, /sci/!

Sure, let's.

698 + 124

600 + 100 + 98 + 24

700 + 98 + 24

700 + 98 + 2 + (24-2)

800 + 22

822

>> No.7139754

>>7139275
8 + 5 = 13 - 3 = 10 I guess

>> No.7139761

>>7139275
ill defined bullshit.
The kid is right.

Why americans have such a shitty system?

>> No.7139764

>>7139426
Don't worry. They are probably just fucking with you.

>>7139706
All that rage leads to the dark side. It is not healthy for you.

>> No.7139767

Just teach the use of long addition. I still use that shit for adding big numbers.

>> No.7139775

>>7139767
No you don't... It was just a table.

>> No.7139784
File: 8 KB, 260x231, LongAddition_v3[1].jpg [View same] [iqdb] [saucenao] [google]
7139784

>>7139775

A table? What?

If you mean like a 10x10 grid then I think we have different ideas of what long addition is.

Pic related is basically what I do, except with the bottom numbers as superscripts in the relevant positions to the answers and this is what I do in my head when I have to add large numbers.

>> No.7139810

>>7139722
fucking this

I can't understand how you amerifats hate common core. I was not teached this but I learned it myself after struggling with math in elementary school. Makes everything simpler.

>> No.7139891

Arithmetic is a useless practice that makes everyone hate math so the fact that they're actually trying to use it to teach you about numbers is not a bad thing.

>> No.7139912

>>7139388
Ahahah this is what americans are taught. So cute.

>> No.7139936

So /pol/ doesn't understand math and so can't comprehend anything but the exact way they were taught to mindlessly calculate. Makes sense, /pol/ is retarded.

This fills /pol/ with rage. Makes sense, /pol/ are emotionally stunted.

What I don't understand is how this is supposed to be some kind of liberal conspiracy. Like, what do they think the secret goal of it is?

>> No.7139947

>>7139936
>not understanding that anything even slightly bad is the liberals' fault

>> No.7139959

>>7139435
>I'm just so grateful that I was an extremely stubborn child.
>was

>> No.7139962

>>7139936
http://i.imgur.com/3qWW7Hn.gif

>> No.7139965

>>7139936
https://www.youtube.com/watch?v=LQ8Nr3_2724

I still think it's a good thing though

>> No.7139968

>>7139965
what a sick bastard, who the hell wants to help people? damn libruls

>> No.7139980

They could've worded it a bit better.
>From the quantities 8 and 5, how much would you subtract to make 10?

>> No.7139988
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7139988

>>7139275
The kid may go on to get a semi-automatic rifle and shoot up the teachers and their sycophantic pets.

Who would be at fault?

>> No.7139989

>>7139988
/pol/

>> No.7140013

>>7139936
I'll have you know that the /pol/ crowd are very well educated, though most commonly in the fields of genetics and statistics, of which they have thorough and accurate understandings.

>> No.7140027

So many people have no idea what common core actually is. To think I live in a state that wants to do away with it is terrifying. Bobby Gindal of Louisiana wants to replace cc with the old LEAP standards that failed the state a decade ago.

Fuck I need to move

>> No.7140035

>>7139722
Thank you based educator. You saved me the trouble, bro.

ITT: People that pretend to be competent at math can't figure out something that's being taught to first graders.

>> No.7140043

>>7139350
>implying that these techniques aren't used to make a perfect square
>implying this isn't how most people do calculations in their heads

>> No.7140066

>>7140013

kek

>> No.7140099

>>7140035
>>7139810
>>7139722
It was a joke you dolts.

Common core just unnecessarily slows children down in the hopes that the actual slow children will catch up. It's a terrible way for the education system to work. What common core math should be is an after school/summer program for children who are behind.

It helps children visualize math and makes it more intuitive, but the problem is that it eats up too much classroom time that should be focused on more content. Following the common core rigors students only get to algebra 2 their junior year in highschool, leaving just their senior year for advanced topics - they'll literally go into college blind if they enter a STEM field.

>> No.7140105

>>7139275
this is a fucked up question to ask an elementary schooler. this confused me at first glace (and it still looks stupid as hell after reading >>7139285 for an explanation), and honestly i think it is just counter productive to teaching arithmetic.

i'm definitely going to teach my children math personally, i have little to no faith in elementary teachers with this kind of thing.

>> No.7140112

>>7140099
>What common core math should be is an after school/summer program for children who are behind.
That costs money, and public education has been cut steadily for years.

You realize that this track is for the gen ed kids, right? There is an advanced track.

>> No.7140121

>>7140099

It doesn't slow down anything. It's just teaching a kid how to fish, as another anon put it, instead of giving them fish. They're replacing the old way of memorizing algorithms with a style of teaching that kids can walk away from and actually understand what the fuck they just learned. Most intelligent kids figure out the common core way on their own, but the rest of the kids don't know what they know. I don't see how anyone can have a problem with doing things the right way in a kid's formative years vs trying to cram in more algorithms and memorization so they can get to geometry by 7th grade instead of 8th

There's a lot of creativity involved in actually understanding math deeply that has been ignored for the past 50 years because of autists like you who think an A on every test means you'll publish a thesis someone will want to read.

>> No.7140137

>>7139307
These exercises are trying to teach one-to-one correspondence to children who should have got a grip on one-to-one correspondence when they were 6.

Children are meant to realise that adding 11 is the same thing as adding 10 then adding 1 long before they're taught "long addition" or "long substraction" or "long division " or "long multiplication".

the algorithms of the above terms in quotation marks are taught because they're the most robust and fast way of doing things and they scale easily to larger numbers.

Telling a child to calculate 43248901 - 89257 + 34958994723 = ? with the common core method will generally cause them great difficulty because they'll lose track of their imprecise scribbles and "make up to 10" because there's too much for them to keep track of.

But the 'old fashioned' way that sum will be easy for a child and only involve a slightly longer time spent.

>> No.7140159
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7140159

>>7140137
You do realize that kids are taught the standard algorithm too, don't you?

>> No.7140163

>>7140159
if you say so.

But many of the examples of common core text books and learning materials seem extremely terrible like >>7139275

>> No.7140199

Why do people even come up with this shit
I mean, even if this somehow makes people learn math easier, how much can math be improved by this.
By the end of the first grade everyone knows how to add and multiply and stuff, how much fuckin better can it get

>> No.7140205

>>7140112
Depends. Many school districts have limited their advanced courses due to expenditures launching common core.

Summer school is already a thing... This would just shift the curriculum.

>>7140121
You're a fucking idiot. Most kids aren't even prepared for college level algebra after the common core treatment, much less the rigors involved in STEM fields. Learning math from an intuitive viewpoint is important, but an unnecessary part of the curriculum. Creativity in math is not important until you reach post-graduate level research, get the fuck out of here with creativity.

>> No.7142302

>>7139388
I know it gives the same answer, but my mental method to solve this is:
124 + (698) = 124 + (700 - 2) = 122 + 700 = 822

>> No.7142395

>>7139965
>>7139965
>we live in a white privilege society
>let slow down the educational system to end the white privilege

why?

>> No.7142413

>>7140205

But it's not an unnecessary part of the curriculum. We've done it for years without an intuitive approach and turned out several generations of people that don't even understand why factoring works. Meanwhile, most elementary school gifted programs have kids doing algebra with scales and colorful blocks...an approach developed by smart adults who were once smart children. I don't see why we shouldn't afford all kids the chance to learn intuitively, and most scientific people would agree with me. When tinfoil rednecks complain about Bill Gates, George Soros, etc being behind Common Core I can't decide whether to laugh or cry that a bunch of poor schlubs think they know how to educate better than genius-level billionaires

>> No.7142430

>>7139285
I refuse to believe that children need this to understand how to do addition

>> No.7142443

>>7139275
I do this when I do arithmetic anyway.

I can see why it would be a totally worthwhile exercise and how it would make teaching arithmetic better.

It's just different. Everyone who complains about it is either a moron or just plain stubborn.

>> No.7142463

A kid that understands that 8+5 is the same thing is 10+3 is 10x smarter and will have a much easier time learning new math concepts than a kid than can do long division of 12378/4824.

>> No.7142679

>>7139275
They're trying to instill shortcuts to make it easier.

Example.
Add 64+37

First I'd think, take 6 from 37 to make 70.
Now add 31 to 70 and we have 101


This is easier to do in your head (for me) than adding 64+37 directly. Maybe not so much for this problem, but the logic extends to other arithmetic problems that may not be so straight forward.