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And so 1+1 = potato
This is a fun thread where DUmmies do math. <Warning> Head will hurt after reading this thread <you have been warned>
http://upload.democraticunderground.com/10024624080
pokerfan (26,335 posts)
About That ‘Common Core’ Math Problem Making the Facebook Rounds
(http://i.imgur.com/2kifJAO.jpg)
That picture is especially popular on conservatives’ Facebook walls… and I’m sure one of your relatives has said something about it, too.
On the surface, it seems ridiculous. The top makes sense; the bottom is silly; screw you, Common Core!
Except that the top doesn’t make sense, the bottom does, and the connection to Common Core is completely misunderstood. (Says this math teacher.)
http://www.patheos.com/blogs/friendlyatheist/2014/03/07/about-that-common-core-math-problem-making-the-rounds-on-facebook/
Lovely thread by the best and brightest on the interwebz :lol:
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The example in this new way of thinking was making change for $20.
I still don't get the formula. If something costs $12, why would I give the cashier $32?
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This completely takes out the "thinking" aspect of math. Let's see these f'n idiots try to go about their daily lives using this math. I doubt anyone wants to sit their and wait while these retards are trying to come up with a figure using this new bullshit. It's turning kids into brain dead morons that HAVE to rely on aids to solve an equation. JUST USE YOUR F'N HEAD! ....but I'm bitching at the DUmmies so I realize that's a feckless point.
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First lattice multiplication and now this crap.....how stupid do they want to make kids.
Charlotte N.C. is having a round. They are moving the school district lines around shifting students from the better performing schools to the lower performing schools so as to raise the scores.....or that's the way the parents and myself see it. Gotta do it to get Obama great leap backwards money.
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First lattice multiplication and now this crap.....how stupid do they want to make kids.
Charlotte N.C. is having a round. They are moving the school district lines around shifting students from the better performing schools to the lower performing schools so as to raise the scores.....or that's the way the parents and myself see it. Gotta do it to get Obama great leap backwards money.
Well, that's the lesson of Socialism, ain't it? I see a lot of private school registrations in the near future.
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Fuzzy math. :mental: :bs:
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They do manage to talk something to death. They all seem to be saying the same thing while not saying anything at all.
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And if your child happens to think for themselves and just does the math, they are WRONG! The right answer no longer matters, every single step must be performed or the answer is wrong.
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It's the new math version of "redistribution of wealth."
.
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DU Math was first introduced by McDonald's in the late 90s when they replaced numbers on their cash registers with pictures of food.
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DU Math was first introduced by McDonald's in the late 90s when they replaced numbers on their cash registers with pictures of food.
Heh.... no shit, they really did that?
<<<Hasn't been to a McDonalds since the 80's.
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joeglow3 (4,378 posts)
25. The problem is when teachers ONLY teach it the common core way
I am a CPA and have always loved working with numbers. My wife, not so much. Our son had some homework that made ZERO sense to our son, my wife and myself. After the two of them spending a couple hours, I sat down with my son. I looked at the problem and explained 2 or 3 different ways to get to the correct answer and one them really stuck him. We then spent time explaining how and why it works. We then showed how it was similar to the other methods. By the end, he understood all the different methods, except the funky one. He nailed them all, and was given an incomplete because he did not do it the "right" way.
Star Member kentauros (24,046 posts)
65. And therein lies the problem with The System,
i.e., who's in control right now. [b/They don't want the right answer, they want the right process[/b]
"Think the way we do, or you fail."
Common core math is just fun math using shortcuts and approximations. Try using common core math on your income tax. (http://www.conservativecave.com/Smileys/default/rotf.gif)
Here's some real fun math....can you tell if this number is divisible by three in 15 seconds?
163548029464632893746209902344892982558
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Common core:
1+1= POTATO
I CAN COUNT TO HAM!
MY FAVORITE NUMBER IS HAM!!
The absolute genius of Obama. Take the worst performing school system's superintendent and put that man in charge of the nations education. Oh and pay a lot of cronnies lots of money for pure crap.
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Common core math is just fun math using shortcuts and approximations. Try using common core math on your income tax. (http://www.conservativecave.com/Smileys/default/rotf.gif)
Here's some real fun math....can you tell if this number is divisible by three in 15 seconds?
163548029464632893746209902344892982558
Yes but I had to make the numbers larger so I could put my finger on them to keep my place.
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By the end, he understood all the different methods, except the funky one. He nailed them all, and was given an incomplete because he did not do it the "right" way.
That is a legitimate complaint, and if it's still going on, I'm pissed.
I attended elementary school through the 4th grade in a small town alongside the Platte River of Nebraska, where conventional teaching of arithmetic was used.
Beginning with the 5th grade, I was one of those art-nouveau elementary schools in a small town in the heart of the Sandhills. There, even though the teachers were more ancient than those I'd had in the previous school, all these "new" things, these left-wing teaching methods, were applied.
Long division was my downfall. I'd learned it the standard old way in the old school, but the new school used a different way, probably some creation of the "childhood educator" the old terrorist William Ayers.
I tried, but I didn't get it. So I continued doing long division the old way.
My teacher in the 6th grade was a real witch about this. Even if my answer was correct, she'd still mark it as wrong, and keep me after school.
Whereas I'd been indifferent, or perhaps mildly enthusiastic, about arithmetic before, I got really antagonistic about it beginning at that time. I went all the way through high school without taking a single course in mathematics.
At the time, the University of Nebraska-Lincoln was compelled by law--it's not so any more, alas--to admit anyone who sought admission, who was a graduate of any high school in Nebraska, and so I got in there anyway.
But I had to take mathematics in college; there was no way out of it.
However, since I could now do the mathematics my way, it was a breeze, despite no high-school algebra, geometry, calculus, whatnot. I didn't get As--they were usually low Bs and high Cs--but I think that was pretty impressive, given my previous non-learnage.
Even though I was getting a liberal arts degree, I still had to take four courses (12 credit hours) in one of the "hard" sciences--chemistry, biology, zoology, botany, whatnot. I opted for what I figured was the easiest of the hard sciences, and took physics. I got As in all four of them.
Teaching "there's only one way, and it's the new way" is shit.
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(http://i.imgur.com/2kifJAO.jpg)
A government liberal HAD to design this - Only the government would replace a simple subtraction problem with five addition problems and declare it better.
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(http://i.imgur.com/2kifJAO.jpg)
A government liberal HAD to design this - Only the government would replace a simple subtraction problem with five addition problems and declare it better.
Don't you see....it's the "Make Work" union way. The old way is to simple, to fast and puts workers out of a job.
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Yes but I had to make the numbers larger so I could put my finger on them to keep my place.
A pencil works better.
What method did you use?
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(http://i.imgur.com/2kifJAO.jpg)
Today, they don't teach real math or English. Maybe the "'Old Fashioned' way" was better. In the real world, the product will fail if the process only produces an "approximate" product. Close only counts in hand grenades.........
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Where did 15 come into play?
I know, I know, liberals fixin' shit that ain't broke.
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I'm guessing this example is misleading. Obviously, nobody in his right mind is going to subtract 12 from 32 via several steps to get 20, but this is how I do math in my head for numbers not so obvious. Also, there are extra steps in the example that is ridiculous.
Pretend this wasn't an easy example... bear with me. I'd look at 32 - 12 and think, "I gotta get to 30". 12 plus what is 30? 18, 18 + 2 = 20.
Think of a number such as 3743 - 1649. I'd think, "51 to round to 1700. Add 2000. + 43. = 2094.
For myself, it's a faster and easier way to do math in one's head when one doesn't have a pencil and paper handy. While I've taught all of my children standard math. I also taught them how to do math "the easy way" in their heads. It is also a good way to check one's math to ensure it was figured correctly when done the standard way in one's head.
Edit to add: HOMESCHOOL. You can teach your kids how to do math however you think best for them. ;)
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Heh.... no shit, they really did that?
<<<Hasn't been to a McDonalds since the 80's.
(http://i16.photobucket.com/albums/b26/flagator/McDRegister_zpsf3a1cb5b.jpg)
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Well I don't know what the hell kind of math that is.
However... there are all kinds of little arithmetic tricks in math you can do in your head that makes people think you are a genius. I remember back in some computer classes I had back in the 80's they had something called subtraction by addition. Had to do with assembler and how to calc stuff when you were writing assembler. This was in binary though. Some of that stuff was pretty neat. I remember in my Algorithm class how you could find the LCD of anything by adding certain digits of the numbers you had and get the answer in like 4 or 5 steps. This was in base 10 too. I actually taught it to Mom, she was not good at math, and she loved it so much she taught it to her 5th grade class for years. Can't remember it now and neither can mom. Got to be out on the net somewhere.
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I had a first-year Geometry teacher in high school. For whatever reason, I seemed to do well in this course despite a major deficiency in math. The teacher was fresh out of Texas Instruments and was willing to think outside the box. One lesson the other students just weren't getting. I had figured out a much simpler process than what was in the book so he looked at that and just let me explain it out. A huge boost for a student that wasn't accomplished in regular math courses. A willingness to try a better method would be completely alien to a common core lesson today.
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It looks to me like a way to reduce math to something you can do by counting on your fingers.
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A pencil works better.
What method did you use?
163548029464632893746209902344892982558
I started off 3 into 16=5 with 1 left over...3 into 13=4 with 1 left over....3 into 15=5 0 left over.....3 into 4=1 with 1 left over ......and when you get to the last number if it can be divided with nothing left then it's divisible by 3.
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There are 10 kinds of people in this world.
Those that understand binary numbers
And those that dont.
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nadinmath: 60 centimeters = 1 meter
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163548029464632893746209902344892982558
I started off 3 into 16=5 with 1 left over...3 into 13=4 with 1 left over....3 into 15=5 0 left over.....3 into 4=1 with 1 left over ......and when you get to the last number if it can be divided with nothing left then it's divisible by 3.
It's easier if you just strike out the 0s, 3s, 6s, and 9s. Then strike out digits that add to a digit divisible by 3 like 1+5, 8+4, 7+1+4, etc. When you're done, if nothing remains, the number is divisible by three. Otherwise, not.
But ya done good!
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It's easier if you just strike out the 0s, 3s, 6s, and 9s. Then strike out digits that add to a digit divisible by 3 like 1+5, 8+4, 7+1+4, etc. When you're done, if nothing remains, the number is divisible by three. Otherwise, not.
But ya done good!
I teach my students if the digits add to a number divisible by 3, then the whole number is divisible by 3, never thought about striking 3,6,and 9. Good to know! Thanks
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There are 10 kinds of people in this world.
Those that understand binary numbers
And those that dont.
Mostly tech people get that.
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Mostly tech people get that.
I'm not what one would consider a 'techie,' but I get it.
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163548029464632893746209902344892982558
I started off 3 into 16=5 with 1 left over...3 into 13=4 with 1 left over....3 into 15=5 0 left over.....3 into 4=1 with 1 left over ......and when you get to the last number if it can be divided with nothing left then it's divisible by 3.
Why? Is the goal to find long strings of numbers evenly divisible by three?
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Why? Is the goal to find long strings of numbers evenly divisible by three?
No. It's just fun with numbers. It's like common core, only easier and more accurate.
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Common core:
1+1= POTATO
I CAN COUNT TO HAM!
MY FAVORITE NUMBER IS HAM!!
The absolute genius of Obama. Take the worst performing school system's superintendent and put that man in charge of the nations education. Oh and pay a lot of cronnies lots of money for pure crap.
[youtube=425,350]-o98HK2Lvw0[/youtube]
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nadinmath: 60 centimeters = 1 meter
:rofl: :rofl: :rofl:
Forgot all about that!
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Mostly tech people get that.
If someone laughs at it, then you know they understand base 2. If they look confused, tell them to go to the command line on their PC and type in Format C: :rotf: :rotf:
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Thank God that I'll probably be retired before any of the children that are learning this new super math enter the workforce. How could I ever hope to compete with these up and coming Einsteins? What's going to happen when they use their super math powers to figure out their share of the 17 trillion dollar debt?
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Or tell them that their System32 file has a virus on it and that they can get rid of the virus by deleting that file.
My favorite to piss off my co-workers is converting binary to hex and vice-versa.
Easy method, if going from binary to hex, simply split into every four characters, then that is 1-F. Example:
1001000111001011....1001/0001/1100/1011...91CB.
Yes, lots of relays, etc., still let us get this far down into the weeds.
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It's easier if you just strike out the 0s, 3s, 6s, and 9s. Then strike out digits that add to a digit divisible by 3 like 1+5, 8+4, 7+1+4, etc. When you're done, if nothing remains, the number is divisible by three. Otherwise, not.
But ya done good!
I did it on the screen, ignored the 3s, 6s and 9s. when other numbers added up to a multiple of 3, I dropped them and went to the next numbers.
Which number is divisible by 11?
94,536,805
95,436,804
96,435,804
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Or tell them that their System32 file has a virus on it and that they can get rid of the virus by deleting that file.
My favorite to piss off my co-workers is converting binary to hex and vice-versa.
Easy method, if going from binary to hex, simply split into every four characters, then that is 1-F. Example:
1001000111001011....1001/0001/1100/1011...91CB.
Yes, lots of relays, etc., still let us get this far down into the weeds.
LOL!!!!
Binary to hex is easy and hex to binary is easy. I love binary! Back in school I could never, ever do equations in hex. I always converted it to binary and did it that way. The Prof let me do it as long as it wasn't in base 10. :cheersmate: :cheersmate:
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I did it on the screen, ignored the 3s, 6s and 9s. when other numbers added up to a multiple of 3, I dropped them and went to the next numbers.
Which number is divisible by 11? =3
94,536,805 -no
95,436,804 -yes
96,435,804 -yes
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I did it on the screen, ignored the 3s, 6s and 9s. when other numbers added up to a multiple of 3, I dropped them and went to the next numbers.
Which number is divisible by 11? =3 eleven
94,536,805 -no yes
95,436,804 -yes no
96,435,804 -yes no
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See how fun it is.......binary, octal, decimal, hexadecimal...(http://www.conservativecave.com/Smileys/default/yahoo.gif)
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See how fun it is.......binary, octal, decimal, hexadecimal...(http://www.conservativecave.com/Smileys/default/yahoo.gif)
I ain't heard of octal in 25 years, Marv. Never used it professionally. Not sure why they even taught it. :cheersmate: :cheersmate:
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I ain't heard of octal in 25 years, Marv. Never used it professionally. Not sure why they even taught it. :cheersmate: :cheersmate:
The same reason we have the Rankin temperature scale.
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IBM's System 3 was octal based. It was designed for small businesses:
(http://www.corestore.org/s3ownersm.jpg)
It had its own 96 column punch card:
(http://upload.wikimedia.org/wikipedia/commons/thumb/1/19/System_3_punch_card.jpg/721px-System_3_punch_card.jpg)
It barely got out of the seventies because hardware was getting cheaper, smaller and faster. The Commodore 128 could compete with it:
(http://commodore.ca/gallery/adverts_commodore/c128%20ad.jpg)
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IBM's System 3 was octal based. It was designed for small businesses:
Cool. I guessing system 36 and the AS400 replaced that?
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Our school systems changed over to some Common Core related nonsense this year school year. I absolutely loathe everything it stands for.
My daughter, aged 13, who has always struggled with Math, and who I have tried to teach (because of her difficulties) that she would need to apply herself that much more because of it (life lesson and all), now doesn't have to apply herself at all, because it's got no structure. She loves it, and pretty much doesn't need to apply herself at all.
My son, aged 6, who has a natural affinity for numbers (he can already do multiplication and division in his head), will suffer because of the stupid ways in which they have to "show work" in such an absurd way.
God forbid kids these days be encouraged to work hard and see the fruits of their labors through achievement and advancement. It's infuriating, especially when the education system goes against everything we try and teach them at home about personal responsibility.
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Our school systems changed over to some Common Core related nonsense this year school year. I absolutely loathe everything it stands for.
My daughter, aged 13, who has always struggled with Math, and who I have tried to teach (because of her difficulties) that she would need to apply herself that much more because of it (life lesson and all), now doesn't have to apply herself at all, because it's got no structure. She loves it, and pretty much doesn't need to apply herself at all.
My son, aged 6, who has a natural affinity for numbers (he can already do multiplication and division in his head), will suffer because of the stupid ways in which they have to "show work" in such an absurd way.
God forbid kids these days be encouraged to work hard and see the fruits of their labors through achievement and advancement. It's infuriating, especially when the education system goes against everything we try and teach them at home about personal responsibility.
Scoobie, I have found that most anything can be taught to a child or adult if they have a interest in the subject.
It takes a special kind of teacher to find a way to make a subject interesting and fun, something to look forward to.
I remember the high school male teacher in the NYC school system that was taring his hair out trying to teach math to his kids in an inner city school. One day he happened to over hear a couple gang bangers talking about the cost of weed and they were speaking of the cost in grams.
Bingo, lights and bells went off so he redirected his teaching methods to what the kids would use in their lives. He went into Everything from what a 20% rise in food stamps would mean in buying power to a 15% raise per gram in drugs. He took the kids on field trips to the stores having sales of items to see and calculate if this was a good deal or a scam.
The test scores of the kids went up so high the school began to look into his methods and
he was fired for not following the lessons plan he was given.
Math ,not all peoples brains are wired to be able for everyone to accept the concept of everyone else. Same as most subjects from Art to learning a new Language.
One size does not fit all.
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(http://upload.wikimedia.org/wikipedia/commons/thumb/1/19/System_3_punch_card.jpg/721px-System_3_punch_card.jpg)
So many punches just to spell "ZORCH IT'S A SYSTEM 3" - I don't understand the values beneath the letters. They aren't sequential.
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Cool. I guessing system 36 and the AS400 replaced that?
(http://www.corestore.org/3-400.jpg)
(http://upload.wikimedia.org/wikipedia/commons/thumb/1/19/System_3_punch_card.jpg/721px-System_3_punch_card.jpg)
So many punches just to spell "ZORCH IT'S A SYSTEM 3" - I don't understand the values beneath the letters. They aren't sequential.
B-A-8-4-2-1...............
B,A, 4, 1 would be the letter "E". 4,2 would be the number "6". The B and A punches were needed to extend the code for the 26 alpha and selected special characters. If you look at the A, B and numerical punches, and the corresponding letter, you can decipher it.
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Carl said something my elementary teachers used to say to me...stop using your fingers !
Oh, and I got a kick of of the 10 kinds of people.
I love rational numbers.
I only like irrational numbers.