CommieCore Math

[tophat9000]

Its reverse logic
32-12=x is the same as (12+x)=32

[Right Brother]

It took me about 20 minutes to figure out how and why this process works

Please enlighten us, because I don't see it.

[latina4dubya]

i get it too... but this is the kind of stuff i would do with my kids (my sons) for fun—aside from the school work... we are homeschoolers, btw...

[Domandred]

this thing?

It's in Kindergarden. I had to google wtf it was the first time my daughter brought it home. I WISH I had time to homeschool :(

[so_real]

Wow ... subtraction through reverse construction. I absolutely pity the child making change for a twenty in the checkout line using this method. If this is real, this is child abuse on a level beyond physical or verbal. We'll need a new term to describe it.

[metmom]

Yeah, but try to do that procedure in the store when you are trying to mentally calculate numbers.

[funfan]

Can they just use an abacus?

[Right Brother]

Okay. You, Quis, and Fzob need to explain it to the apparent mathematic pinheads like me.

[RandallFlagg]

My 13-year-old Son does it like that, I think.
He does multiplication using, “lattices,” which looks somewhat similar.
I still don’t get it, though.

[funfan]

LOL! I thought it might have been a new grading system.

A B L L-

[Seaplaner]

I've sat through quite a few math classes, including some at the post-graduate level.

I do not easily follow the "new" way.

Two words for new parents...

Private School.

[Lurkina.n.Learnin]

I’d love to see their work on 12,368,279-7,856,234. It’s not going to be very sustainable though. It will take reams of paper to work out any thing,

[Olog-hai]

It’s about as valid of a method as doing all calculus derivatives by using the limit formula.

[4Liberty]

How do the kids know “12 + 3 = 15”?

Shouldn’t it be

12 + 3 = ______

3 + 1 = 4
4 + 1 = 5
5 +1 = 6
6 + 1 = 7
7 + 1 = 8
8 + 1 = 9
9 +1 = 10
10 + 1 = 11
11 + 1 = 12

[plsvn]

Can they just use an abacus?

Trouble is, using an abacus would treat the problem like "the old fashioned" way.

[funfan]

Zombie Apocalypse.

[dr_lew]

Closest I found to this online was the Common Core First Grade Math Standard for "Operations & Algebraic Thinking", CCSS.Math.Content.1.OA.C.6 :

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

You can see it's the same type of thing. People do use this type of strategy when adding up golf scores, e.g. , looking for all the 5's or 6's, if there are a lot of them, and that kind of stuff. It does seem to be a confusing and anchorless approach, though.

[VanShuyten]

I'm becoming more and more convinced that all we have to do is find out who the recent investors into Kaplan, et al are. There's a scam here somewhere. I just haven't figured it out yet.

[MeshugeMikey]

its utterly insane.

forget sequential logic,,,get in line to be common cored...

[4Liberty]

Sorry, had to get a snack. Where were we.......

12 + 1 = 13
13 + 1 = 14

So,
14 + 1 = 15.