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Old 01-20-2015, 10:14 AM   #41101
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Old 01-20-2015, 10:36 AM   #41102
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Old 01-20-2015, 10:37 AM   #41103
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Ma'am, it's "do your EARS hang low, do they wobble to and fro."


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Old 01-20-2015, 10:49 AM   #41104
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Thats actually very disturbing.
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Old 01-20-2015, 11:09 AM   #41105
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Old 01-20-2015, 11:15 AM   #41106
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I've seen some of the new ways kids are taught to do simple math, shit it crazy.
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Old 01-20-2015, 11:19 AM   #41107
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Old 01-20-2015, 11:31 AM   #41108
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Old 01-20-2015, 11:38 AM   #41109
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Originally Posted by 0393gt View Post
I've seen some of the new ways kids are taught to do simple math, shit it crazy.
If my kid comes home with that "common core" bullshit, I will be standing in the principal's office the next day demanding that they fire the teacher who is trying to destroy my child's logic.

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Old 01-20-2015, 11:39 AM   #41110
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Originally Posted by Bputacoma View Post
fucked up math picture
If I had a kid, and they brought that home, I would immediately look into home-schooling, so that they could be taught how to do math correctly.

That, or blow up the school admin building.
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Old 01-20-2015, 12:24 PM   #41111
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It's not right or wrong; it's just another way to look at a simple arithmetic operation. In this case, it's just an application of the substitution and associative properties that IMO makes mental math easier. Since they're still learning the basics, it's best to start off small with numbers they can understand and work their way up to the more difficult numbers that this would actually be used for.

What's 1234567 + 9999? It's 1234567 + (10000 - 1) = (1234567 + 10000) - 1 = 1244567 - 1 = 1244566
What's 37 x 25? It's 37 x (100 / 4) = (37 / 4) x 100 = 9.25 x 100 = 925
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Old 01-20-2015, 12:30 PM   #41112
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Of course you can round number to make them easier to add or subtract and the un-round them back, but the question didn't make much logical sense and the answer the teacher gave to get it was ridiculous.
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Old 01-20-2015, 12:38 PM   #41113
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Originally Posted by line-em-up View Post
Of course you can round number to make them easier to add or subtract and the un-round them back, but the question didn't make much logical sense and the answer the teacher gave to get it was ridiculous.
The question was worded poorly but the teacher's response was right on.
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Old 01-20-2015, 12:54 PM   #41114
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Quote:
Originally Posted by Nash B. View Post
It's not right or wrong; it's just another way to look at a simple arithmetic operation. In this case, it's just an application of the substitution and associative properties that IMO makes mental math easier. Since they're still learning the basics, it's best to start off small with numbers they can understand and work their way up to the more difficult numbers that this would actually be used for.

What's 1234567 + 9999? It's 1234567 + (10000 - 1) = (1234567 + 10000) - 1 = 1244567 - 1 = 1244566
What's 37 x 25? It's 37 x (100 / 4) = (37 / 4) x 100 = 9.25 x 100 = 925
If you want the kids to learn this, then ask them something like 999 + 17? It's easy for them to see that 999 + 17 = 1000 + 16. That way they learn to move numbers to get simple numbers. I just went through this with my 11 year old and proportions. My wife teaches at his school, and I came unglued seeing some of the problems. We were even watching videos his math teacher posted of her working problems. It made no fucking sense. The beauty of math is that you always have a right answer and set ways to get to it. Sure, there are some shortcuts, especially for mental math, but that problem was not one.

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The question was worded poorly but the teacher's response was right on.
Her answer wasn't spot on since it didn't answer the question. 8 + 5 = 13, not 10. Also, 10 + 3 = 13, not 10. The question sucked and so did her answer.
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Old 01-20-2015, 01:01 PM   #41115
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agreed... question and answer suck

any intelligent person utilizes those techniques to some extent... but forcing EVERYBODY to use them when adding shit like 8 & 5 just to try to get through to a few morons who will never use them later in life is ridiculous
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Old 01-20-2015, 01:19 PM   #41116
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Quote:
Originally Posted by juiceweezl View Post
If you want the kids to learn this, then ask them something like 999 + 17? It's easy for them to see that 999 + 17 = 1000 + 16. That way they learn to move numbers to get simple numbers.
You don't start off in the deep end. You spend time in the shallow end, learn the basics, get comfortable, and then move up. Same with math. You start with small numbers and simple problems, master them, and move on to larger numbers and more complex problems.
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The beauty of math is that you always have a right answer and set ways to get to it. Sure, there are some shortcuts, especially for mental math, but that problem was not one.
I think the beauty of math is that you're given some simple tools (addition, multiplication, exponents, etc.) and some basic rules about how the tools work together (order of operations, arithmetic properties), and set loose to use those tools however you see fit as long as you don't violate the rules. There are definitely more efficient ways to solve certain problems, but there's never a right way or a wrong way (as long as you don't violate the rules).
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Her answer wasn't spot on since it didn't answer the question. 8 + 5 = 13, not 10. Also, 10 + 3 = 13, not 10. The question sucked and so did her answer.
The question was: how do you make 10 when adding 8 + 5? And her answer was take 2 from 5 and add it to 8 (8 + 2 = 10), then add 3. She made 10. The question was bad (it should've been something like "how can you rewrite 8 + 5 as the sum of 10 and another number?"), but her answer was correct.
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Old 01-20-2015, 01:46 PM   #41117
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Quote:
Originally Posted by juiceweezl View Post
If you want the kids to learn this, then ask them something like 999 + 17? It's easy for them to see that 999 + 17 = 1000 + 16. That way they learn to move numbers to get simple numbers. I just went through this with my 11 year old and proportions. My wife teaches at his school, and I came unglued seeing some of the problems. We were even watching videos his math teacher posted of her working problems. It made no fucking sense. The beauty of math is that you always have a right answer and set ways to get to it. Sure, there are some shortcuts, especially for mental math, but that problem was not one.


Her answer wasn't spot on since it didn't answer the question. 8 + 5 = 13, not 10. Also, 10 + 3 = 13, not 10. The question sucked and so did her answer.
I agree.

I would do the problem differently to get to 13.

8+5=?
Round up 8 to 10 by getting the difference between 8 and 10. 2
Now you have 10+5, which is easy to solve. 15
Now subtract the same 2 that you borrowed out of your ass.
15-2=13.

Or, you could simply remember that 8+5=13. Of course, that no longer makes sense and neither does their badly worded question; if that is what they were wanting you to do.

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Old 01-20-2015, 01:51 PM   #41118
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These last few pictures are boring as hell!
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Old 01-20-2015, 01:54 PM   #41119
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Old 01-20-2015, 02:08 PM   #41120
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From an Asian teacher I know, though she doesn't like it, she said this is the method that was always taught in like Singapore where she grew up.
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