Posted on 02/13/2014 8:05:41 AM PST by rktman
Here is the latest in a long line of frighteningly stupid Common Core math worksheets to bubble up courtesy of Twitter, according to Twitchy.
(Excerpt) Read more at dailycaller.com ...
This so called ‘estimate’ didn’t even use the rules of rounding correctly.
The old fashion drill and kill method of learning ones ‘tables’ did more to help teach arithmetic (which this is....it is not ‘mathematics’ as such).
We wonder why people can’t do calculations when their quackulator dies and we now know why.
This is malfeasance of the highest order
GMTA - that was the poorest excuse for an estimate I can imagine. The larger skill evident in that example is the ability to do such problems in your head. Better rounding improves accuracy and allows the learner to understand numbers better. This also builds toward such skills as understanding why multiplying a fraction or a decimal by another fraction or decimal achieves an answer that is smaller than the original number.
Yes estimation is a legitimate technique. It also assumes that you know how to round correctly.
The best method is have these children learn their tables and then there is no issue.
That’s the way I learned it but to be even more correct and not to introduce bias whenever it is truly _ 50 (Not 501 or 50001) you round to the nearest even.
For example,
350 rounds up to 400 because 4 is even
450 rounds down to 400, not up to 500 (because 5 is odd)
My kids would go bats if I tried to teach them that ... except for Patrick, who would memorize it and then try to apply it to all sorts of irrelevant situations.
How are you doing in the snow? We’re out of beer, wine, and club soda. My husband is getting restive.
Ayup. Works for me at the checkout counter. Just last night, in fact, I was charged twice for something that was $6.94, and not for the item that was $0.94. I had a rough idea in my head how much my 5 items should have cost, so when it was so much higher, I asked.
Actually that’s a rounding rule if you’re doing statistical calculations. It’s pretty easy once you get the hang of it. Pretty irrelevant though because any kind of statistical calculations are done by computer. It’s important if you’re writing code though.
When do you think they’ll clear the roads? Or will they just wait for everything to melt?
Nobody’s going to clear the roads in my neighborhood. I haven’t been out to see what 74 is like, but they’d pretreated it before the snow started.
Well, not really. Rounding properly will give an estimation of 700. Plenty of fuel.
I remember in 2nd and 3rd grade, our teachers continually asked us, “Does your answer seem reasonable?” I am a Mechanical Engineer, and minored in math. That question has saved my bacon many times.
Common Core is crap, but this is not a good example of that. (Except they don’t know how to round...)
These skulls full of mush are the next doctors, pilots, and accountants. I bet the liberals will scream victim when they are killed or short changed by this “good enough” attitude.
Doctor: “Sorry you are dying, but I thought that medicine was close enough.”
Pilot: “Sorry you paid to go to San Jose, but Phoenix is close enough.”
Accountant: “Sorry you are out of money, but I rounded down a lot because it was easier.”
“Many real life problems don’t require exact answers.”
I can think of far more that do than don’t.
Nice solution! Actually, it might be more accurate sometimes, as you pointed out, it’s easier to measure something short.
fl
“Close enough is good enough for government work. And since all the products of Common Core will be working for the government, why give them more than enough?” - BINGO!
My boys used to ask, “How long till we get there?” on trips. My answer was the number of remaining miles and my current speed.
They would say, “Nevermind”, to which I would reply, “Nope, you started it. Tell me how long.”
“But I don’t have a calculator.”
“Too bad. Do it in your head.”
One is now an architect, and the other is an engineer.
Check this out
https://www.duke-energy.com/north-carolina/outages/current.asp#outagemap
It’s the Duke Energy outage map for your area. Looks like thousands of folks are out of power.
Interesting! Looks like it’s mostly in Charlotte, only one outage site is near me.
New, new, new, new, math?
Completely negates conventional number theory and thus, the ability to learn ANY advanced maths. Good bye future engineers, hello degradation into the stone age. Humans who actually get past this idiocy will be called “mage” or “magister.”
Pretty scary.
KYPD
Boy is the estimate off!
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