Homeschooling Moms
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Start at 27
27+3=30
30+20= 50
50+2= 52
3+2+20= 25
Ok am I the only one thinking that that's horse poop?
I'm not great with math and I admit that but this is my approach:
5227
127=5
4020=20
20+5=25
My husband who is an engineer said that he would Solve 5227 like this:
527=45
4520=25
We both find the above way very long and has unnecessary steps.
The reason I ask is because on another board the teacher said that this was the method that people with strong math concepts use to figure out problems in their head.
Also I see this frequently as CC aligned or how the CC says to figure out these problems. To me all those steps are confusing. I dunno... I just don't get it.
Replies

I have a friend that says that's the way she thinks them out in her head, so she was pleasantly surprised to find that she could understand the CC math that her kids were bringing home.
However, I refuse to teach my kids that. I show them shortcuts, of course. IF they choose to use them when figuring math problems, that's just fine. That's how I feel about the common core crap. Just teach it straight:5227 starting with the ones then tens... If they come up with a way to figure it out in their head faster, then awesome. But it should be left to each kid to figure out how their brain works. Show them shortcuts, sure, but don't make it standard.

Quoting Jlee4249:
I have a friend that says that's the way she thinks them out in her head, so she was pleasantly surprised to find that she could understand the CC math that her kids were bringing home.
However, I refuse to teach my kids that. I show them shortcuts, of course. IF they choose to use them when figuring math problems, that's just fine. That's how I feel about the common core crap. Just teach it straight:5227 starting with the ones then tens... If they come up with a way to figure it out in their head faster, then awesome. But it should be left to each kid to figure out how their brain works. Show them shortcuts, sure, but don't make it standard.
I use Math U See and so far this stratedy hasn't been used and I don't plan on teaching it. I was just wondering what others thought of it and if it was the normal way to go about figuring out those type of problems. 
Anyone with a solid foundation know there is more than one way to solve math problems. Math is pure logic and problem solving. I suggest making it simple.
5227
I would do 5220=32
Then I would 327=25
Most mathematicians tell you simplify it. Do not make it more complicated. Mathematical is more important than getting the right answer.