5+5+5=15 Is A WRONG ANSWER under Common Core

[Foggy]

Here is just one reason WHY Common Core is believed to be the dumb-downing of American kids:

Here's a "repeated addition" Common Core problem that's taught in third grade in US schools:

Use the repeated-addition strategy to solve: 5x3

If you answer the question with "5+5+5=15,” you would be wrong.





The correct answer is "3+3+3+3+3.”





Mathematically, both are correct.
But under Common Core, you're supposed to read "5x3" as "five groups of three."
So "three groups of five" is wrong.



According to Common Core defenders, this method will be useful when students do more advanced math. This way of reading things, for instance, can be used when students learn matrices in multivariable calculus in high school.

But parents aren't happy about it.

Story by Jacob Shamsian and editing by Ben Nigh.

http://www.businessinsider.com/why-5...n-core-2015-10


To CORRECTLY use this form of logic
(which common core ignors)

it should be taught that BOTH FORMS are correct
(which most schools would like to do)

and that there coiuld be more than "ONE WAY" to get a correct answer.
This expands the "mind set," but instead, The Federeal Department of Education only wants there to be "one way" to get an answer.

WHY?

[Zoneboy]

Johnny: Here's the $5 for my school supplies.

Teacher: Thank you Johnny. Here's your change, $15.

Johnny: Uh, that's not right.

Teacher: Yes it is, 3 five dollar bills = 15 dollars.

Johnny: You said earlier that 3+3+3+3+3 was correct when trying to get to 15 and that 5+5+5 was wrong so it stands-to-reason that 3 five dollar bills does not equate to $15. I'd like to have 5 three dollar bills please.

Teacher: JOHNNY! FOR THE LOVE OF HEAVEN THEY DON'T MAKE THREE DOLLAR BILLS AND EVEN IF THEY DID IT WOULD BE THE SAME THING. 3 5's OR 5 3's IT ALL ADDS UP TO 15 DOLLARS!

Johnny: Now do you see how stupid common core is?

[Wawwie]

Public school is getting more lame by the day.
Thank goodness I can send my girls to private school.

Common core is beyond demented. I would call it something else, but I know the word I'm thinking of offends some people.

[robyrob]

obviously if it is something that is taught for the purpose of algebraic rules and helps build part of the foundation for higher math then it is important.

it is the same thing as teaching the meaning of parenthesis in an equation - if you don't understand how they are used you will not be able to solve future problems; basically if they are taught this and they can't answer it as it was taught then they haven't learned it.

i know nothing about "common core" so I am not supporting it, but if the only argument against learning something because it builds up to higher level math is that some kids will never make it that far, it is not a very good point.

they aren't saying that 5x3=15 isn't correct; if the question is "what is the repeated-addition strategy for 5x3=15", then they should be able to answer it correctly.

[Zoneboy]

Originally Posted by robyrob

obviously if it is something that is taught for the purpose of algebraic rules and helps build part of the foundation for higher math then it is important.

I was lucky enough to have never taken an algebra class in school but even if I had I can't see where it would be of any use for me today. There might be some professions where it would be beneficial but the only math I need to worry about concerns my bank account.

[Bonniegirl]

[IllinoisTVFan]

Originally Posted by Zoneboy

I was lucky enough to have never taken an algebra class in school but even if I had I can't see where it would be of any use for me today. There might be some professions where it would be beneficial but the only math I need to worry about concerns my bank account.

I always struggled with algebra and more advanced math and thought I was below average, but while taking an aptitude test in college I found that I was actually slightly above it, which was odd. I had a wonderful math teacher in college who actually said to me lots of kids can do the math but get nervous. Also, this was at an art college and first day she said "I know you are art students so this is all open book". I'm thinking of going to get another degree and I may need to take another math class (I think it's statistics which sounds interesting not scary)but nope I never used algebra, or geometry, or trig ever. I've used the basics, including dealing with fractions and percentage but never more advanced.

What is going on with public schools? If I had kids they would all attend private schools or be homeschooled. Public schools seem to be pushing a horrible agenda and teaching morals (well what they consider morals)instead of math, reading and writing. Apparently the public schools instead of teaching abstinence as the only way to be as a pre teen or teen are telling the kids to use birth control! Of course I'd prefer the kids to use birth control if having sex but even better is telling them waiting is the best thing.