Posted on 10/06/2014 1:47:52 PM PDT by therightliveswithus
Imagine a teacher asks you to solve this question: 568-293. Depending on your age you might do one of three things...
...Third, you might use the new common core was to subtract, which is much simpler, with only... 10 steps.
First, you would take the 200 out of the 293, and save the 93 for later. Then you would take 568 and subtract 200 from it. Then you'd take the remaining 368 and you would subtract 60 from it, because you are taught that, for some reason, you cannot simply subtract 90 from 368. 368-60 equals 308. Then you subtract 30 from 308 because, again, for some reason 368-90 doesn't exist. 308-30 equals 278. Then you take the three that is left over from 293-290, because you already subtracted 200, 60, and 30 from 293 to get three, and you minus that 3 from the remaining 278 that you got from subtracting 290 from 568. Still following? Good, because one you minus 3 from 278, you get the answer of 275! Then, you double check your answer by adding up 200 + 60 + 30 + 3 to get 293, which is the number you subtracted from 568. Much, much more complicated than the other two methods and an over-complification of a simple problem. More than that, the way to figure out this problem is literally more than the other two methods combined.
This is an actual common core problem which, hilariously, tries to tell students its a mere three steps:
(Excerpt) Read more at thepunditpress.com ...
They're libtards. Of course they want to avoid borrowing. Borrowing implies that something must be repaid. They want free stuff. So until they can come up with an entitlement theory for mathematics, they'll just skip the concept of borrowing and teach how to take ... in three subtle phases.
This is actually a form of reasoning, rather than structured process - Which I applaud. But the reasoning is so convoluted that it is barely useful.
The real problem with CC comes when you find the time to look at social studies or what passes for sex education. The books they use to sexualize such young children will make you want to get your gun. The next School Board meeting should be quite the event.
http://www.bing.com/videos/search?q=Maw+and+Paw+Kettle+Math&Form=VQFRVP#view=detail&mid=15236312CDFCF5DD9F6915236312CDFCF5DD9F69
Or just do the math in your head like I did in about 5 seconds. And that from the gal who made an F in Math 105 at FSU and had to take it over for a D. :-)
( max your volume)
How about using an abacus?
( max your volume)
It’s easier to do it in your head. Take 568 and round up 293 to 300 and subtract. You get 268. Now add back the 7 you added to round up to 300 and you get 275. I did it two seconds in my head.
It would be easier these days to just tell the kids, “take out your smart phone, hit ‘calculator’ and do the problem”! lol
We’ve come a long way towards teaching kids nothing - KY 8th grade test in 1912:
http://vaviper.blogspot.com/2013/07/check-out-this-test-for-eighth-graders.html
This is the new, new math.
Dang it. I need to read more posts before posting myself. You beat me to it.
Many private schools have adopted the Common Core Curriculum as well. My daughter solves it the old fashioned way and reverse engineers the answer to how they want it.
I actually use a similar system in my head, when doing math. I’ve gotten very good at it (knew the answer to this question in around 2 seconds).
And I can usually ‘beat the calculator’ with the kids when the numbers involved are less than a thousand.
However, ever since I was very little, I have realized that my method is ‘backassward’ to most people. Any attempt I have ever made to teach it to people has failed, and I certainly wouldn’t put it in a curriculum.
Sounds like the Operational Manual for every Czar, Obamacare, and Dept Head in Obama's WH, and everything in his Administration.
Like Common Core, this will all Freeze up and be lunched, like an engine run without oil...
Yup! They only truly understand borrowing later in life, like for college.
My personal solution was similar to yours.
293 is 7 away from 300, so add 7 to each number.
568+7 = 575
293=7 - 300
subtract 300 from 575, you get 275. done.
Heh. I did a similar thing. I added 7 to both and then did the much simpler subtraction.
OMG!! I’ve never seen anything DUMBER in my life!!! Math is math....not that hard.....this makes it IMPOSSIBLE to “learn”!
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