Posted on 10/25/2015 3:53:05 PM PDT by grundle
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.
(Excerpt) Read more at businessinsider.com ...
The slope is the variable sought.
The slope is itself a function of x, a single variable.
You strike me as someone who gets irate when he is caught in a silly mistake because he doesn't like to be found wrong. On the other hand, I like to imagine that when the author of my university calculus textbooks titled them Single-Variable Calculus and Calculus of Several Variables, he understood the subject matter well enough to know the former actually exists. Then again, it was only a top engineering school, so what do they know about math.
Stop arguing with editor-surveyor. His tagline should tell you all that you need to know about him.
At one point freedom was the ability to say 2+2=5, now its the ability to say 5x3 is 5+5+5.
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Joke on!
One cannot have a function without at least two variables to compare.
The slope is the result of the relationship between the two variables. In a second order or higher expression the slope is indeed variable, but in a linear expression the slope is constant.
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My tagline tells us all we need to know about you.
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