MHB What is the Common Core method for solving 2x + 3x?

  • Thread starter Thread starter mathdad
  • Start date Start date
Click For Summary
The Common Core method for solving 2x + 3x emphasizes understanding algebraic concepts through arithmetic relationships. The straightforward answer to 2x + 3x is 5x, but the discussion critiques an unconventional breakdown of the equation that seems overly complicated. Participants express skepticism about the validity of the presented method, questioning its authenticity and relevance to Common Core standards. A request for credible sources or citations regarding this method is made, highlighting a lack of clarity in its educational purpose. Overall, the conversation underscores the need for clarity and accuracy in teaching methods associated with Common Core.
mathdad
Messages
1,280
Reaction score
0
When we add 2x + 3x the answer is 5x.

Commore Core Way:

2x + 3x = what?

2 = 3 - 1

3 = 4 - 1

5 = 6 - 1

x = x^1

(3 -1)(x^1) + (4 - 1)(x^1)

Answer:

(6 - 1)(x^1)

Ridiculous! Agree?
 
Mathematics news on Phys.org
You have repeatedly stated a number or things without giving any indication of where you got them. I have dealt with "common core" for some time and I have never seen anything like what you give. Where did you see this? Can you give a citation or, better, a "common core" website that says that?

I will say that what you give would be a ridiculous way to actually calculate, I could see it as a way of introducing students to algebraic ideas, relating the to arithmetic. Letting us see where you saw that would help us determine exactly what the purpose was.
 
My friend's daughter was given 2x + 3x to add for homework via Common Core in her 6th grade class.
 
Thread 'Erroneously finding discrepancy in transpose rule'

Thread 'Erroneously finding discrepancy in transpose rule'

Obviously, there is something elementary I am missing here. To form the transpose of a matrix, one exchanges rows and columns, so the transpose of a scalar, considered as (or isomorphic to) a one-entry matrix, should stay the same, including if the scalar is a complex number. On the other hand, in the isomorphism between the complex plane and the real plane, a complex number a+bi corresponds to a matrix in the real plane; taking the transpose we get which then corresponds to a-bi...
View full post »

Similar threads

B About a definition: What is the number of terms of a polynomial P(x)?
  • · Replies 48 ·
2
Replies
48
Views
3K
MHB Equation 2: Prove that ##x^2+2x\sqrt x+3x+2\sqrt x+1=0##
  • · Replies 4 ·
Replies
4
Views
1K
MHB Solving $\tan^2x + \tan^2{2x} + \cot^2{3x} = 1$ in R
  • · Replies 6 ·
Replies
6
Views
1K
MHB Quadratic equations ( solving for zeros/roots) trickey
  • · Replies 1 ·
Replies
1
Views
1K
MHB Absolute Value Equation |3x - 2|/|2x - 3| = 2
  • · Replies 10 ·
Replies
10
Views
2K
B Given an equation, find the value of this expression
  • · Replies 17 ·
Replies
17
Views
2K
A Rich "isotropic tensor" concept
  • · Replies 1 ·
Replies
1
Views
2K
MHB Inequality solve (x+1)/6<x-(3x-2)/4
  • · Replies 2 ·
Replies
2
Views
2K
MHB Fixed point,, Jacobi- & Newton Method, Linear Systems
  • · Replies 7 ·
Replies
7
Views
2K
MHB Is x+1 a Factor of the Polynomial x^3-5x^2+3x+1?
  • · Replies 2 ·
Replies
2
Views
1K