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View Full Version : Why '5+5+5=15' is wrong under Common Core



Tyr-Ziu Saxnot
12-22-2015, 01:44 AM
http://www.businessinsider.com/tricky-common-core-2015-12


Why '5+5+5=15' is wrong under Common Core

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.

Common core is liberal insanity and happily forced upon our kids by our socialist ran education system.
Math as was taught that advanced us in the world beyond any other nation, spurring the greatest inventions and modernization--suddenly is declare inferior in favor of this new bunch of liberal shit and insanity(globalist agenda)!!!
These people pushing this crap should be in jail!!!
As its a deliberate attempt to destroy our future--our kids and their future promise in this world.
An agenda engineered to set us back decades! Fact..-Tyr

CSM
12-22-2015, 07:28 AM
Just one more attempt by the elite class to control not only WHAT you think but HOW you think ... and HOW you think is far more important because it is the foundation for WHAT you think....

This right in line with the PC movement... "you should think this way, you should feel this way"