David, from what I can gather and surmise Common Core is trying to teach critical thinking skills and relationships between numbers. I think that they are trying to make learning higher math like Calculus easier. Problem being that they are trying to teach everyone by the same method, not by what works best for the person.
From what I see when adding 7 + 9 the concept is that adding 5 and 10 is easy so 7=5+2 and 9 = 10-1 So 7 + 9 = (5+2) +(10-1) = (10+5) +(2-1) = 15 + 2 - 1 =16.
............................. Common Core would have killed me in high school but would have insured a ton of tutoring money in college helping others learn math the right way
Here's the common core solution to that toilet paper math question: they made the roll narrower.I have identified one real world example of where common core is used today.
TOILET PAPER MATH
That's right folks, how can the new 4 roll single equal 4 rolls of toilet paper without them making the core smaller. If this scam isn't Common Core Math I don't know what is since the old single roll used most of the space available on the dispenser but now 4 rolls fit in the same amount of space without making the cardboard core any smaller.
That sounds like CARDBOARD CORE math. Actually, the Kirkland brand from Costco is just as wide as ever, and the rolls contain so much that they won't fit into the built-in wall dispensers of our 1954 ranch house until some has been used up.I have identified one real world example of where common core is used today....the old single roll used most of the space available on the dispenser but now 4 rolls fit in the same amount of space without making the cardboard core any smaller.
That goes back a long way. I remember seeing it in the bathroom when I was in art school in 1972....Someone had written above the paper dispenser Arts Degrees: Pull...