No.13741440 ViewReplyOriginalReport
Can some math person actually explain to me what common core is and how it works?
Suppose you have the following:
>45-15=x
Now the way I'm familiar with it, it would be simple
>45-5=40
>40-10=30
>x=30
Or even
>45-15=x
>Obviously it's fucking 30
>x=30
Why would you do it any other way?