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New Common Core for Math?

ben2974
Posts: 767
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10/29/2014 10:58:04 PM
Posted: 2 years ago
https://scontent-b-lga.xx.fbcdn.net...

I may not be a math major or any sort of engineer, but I'm still a senior college student and I can't figure out this mumbo jumbo! Where do all those numbers come from a simple subtraction?!

Is this even necessary?