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

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SUMMARY

The Common Core method for solving the expression 2x + 3x is presented as an unconventional approach that simplifies the equation to 5x. The discussion highlights a breakdown of the components, where 2 is represented as 3 - 1 and 3 as 4 - 1, ultimately leading to the expression (6 - 1)(x^1). Critics of this method argue that it lacks clarity and practical application, questioning its validity and seeking official Common Core resources for verification.

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mathdad
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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?
 
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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.
 

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