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Math Pop Quiz Stumps Teacher Union Head
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| December 28
| Erin Einhorn
Posted on 12/30/2006 9:36:31 AM PST by achilles2000
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To: achilles2000
in general,
1/N + 1/M = (N+M)/(NxM),
so this doesn't take much effort - - even a mental midget could do it without paper when the denominators are as small as 3 and 4!
To: The Drowning Witch
1) find common denominator. does not have to be least common denominator. can always be found by multiplying the denominators of the two fractions. here: 3 x 4 = 12.
2) convert each fraction to 12ths. here, 1/3 is converted by dividing its denominator into 12 (quotient=4), then multiplying both the numerator and denominator by 4, thus 4/12ths. for 1/4, divide 4 into 12 (quotient=3), then multiply top and bottom by 3, thus 3/12ths.
3) 4/12 + 3/12 = ???
That's the whole ball game.
82
posted on
12/30/2006 10:44:41 AM PST
by
SAJ
(debunking myths about markets and prices on FR since 2001)
To: leda
HAHA! I got it...and I FEAR (!!!!!!!!!!!!!) math!
83
posted on
12/30/2006 10:47:22 AM PST
by
bannie
To: po'boy
Does not work with 2/3 + 1/7 ! You have to multiply the bottom number of one side with the top number and then the bottom number of the other side and then do the same with the bottom number of the other side. The number you get for the bottom after multiplication is now the common denominator 21. The two top numbers can then be added together = 17. 17/21 is the answer. All you are doing is multiplying each side by 1. (7/7*2/3)+(3/3*1/7)= 14/21+3/21 = 17/21
84
posted on
12/30/2006 10:49:24 AM PST
by
Red_Devil 232
(VietVet - USMC All Ready On The Right? All Ready On The Left? All Ready On The Firing Line!)
To: Blue_Ridge_Mtn_Geek
Even more generally.
X/N + Y/M = ((X*M)+(Y*N))/(N*M)
It's will be the correct answer but not necessarily the least common denominator.
85
posted on
12/30/2006 10:50:12 AM PST
by
Dinsdale
To: po'boy
actually since we are working with recipricals add the 3 and 4 together and they become the top number of the fraction...then multiple the 3 and 4 together and they become the bottom number of the fraction....i think?Looks good, for reciprocals of whole numbers: 1/3 the recip of 3, 1/5 of 5, etc.
To: Clara Lou
"No, public school teachers don't "report" to that moron."
For all matters under union control, they actually do.
87
posted on
12/30/2006 10:53:46 AM PST
by
RavenATB
(Patton was right...)
To: secretagent
88
posted on
12/30/2006 10:55:09 AM PST
by
litehaus
(A memory tooooo long)
To: Clara Lou
"No, public school teachers don't "report" to that moron. Yes, I suppose he does lead the charge for those who choose to join his merry band.
"
I note some defensiveness ... are you, Clara Lou, a public school teacher?
89
posted on
12/30/2006 10:56:33 AM PST
by
nmh
(Intelligent people recognize Intelligent Design (God) .)
To: Caesar Soze
I don't think any reasonable and I add reasonable person should be judged by the answer to one question. This woman's mistake has as much meaning as Dan Quayle's misspelling of potato.
It was petty to pick on Dan Quayle, and it's petty to pick on this woman. Our public schools are a disaster. If we want to improve them, we need to rise above their values. That's the way the liberal mind works. Find any minor or imagined weakness and trash the opposition. Is this the kind of people we want to be?
We have an educational channel on our local cable system. I had to deprogram it because it was so disturbing. They were showing classes from elementary school to high school. In almost all lessons besides math, they were more interested in teaching kids liberal values and how to become social activists than teaching basic material. Almost every lesson had some bashing of Western Civilization. I found it painful to watch.
90
posted on
12/30/2006 11:00:03 AM PST
by
Essie
To: achilles2000
"I would need a pencil and paper..."
Yeah right. She would need a calculator. Typical liberal leftist drivel. She's too stupid to lead.
91
posted on
12/30/2006 11:01:08 AM PST
by
Bon mots
To: seowulf
And then does the submissive go on top of the dominator, or is it the other way around? That's new math, right?You have to feel your way along. If the division feels good, do it.
To: AmishDude
NYC education is pretty much an all or nothing game for kids. If you can afford the $20,000 to $30,000 a year then you can get a good education. Ditto for bright kids who go to the specialized schools -- the ones you mentioned, as well as schools like Performing Arts, Art and Design, Fashion, etc.
However, if the you're an ordinary kid with average grades, etc. then you're pretty much kicked to the curb.
Oddly, the same model holds true for employment.
93
posted on
12/30/2006 11:03:38 AM PST
by
durasell
(!)
To: achilles2000
She was 'chosen' to lead her union for her major skill that you mentioned--'crow-barring money out of the NYC school board."
Yeah, that was pretty pitiful. Finding the answer took me about 10 seconds and I consider myself pretty math dumb.
To: achilles2000
She may be a math illiterate, but she crow-barred a lot of money out of the NYC school board and schools chief, Joel Klein. If what I've heard is true, she is in good company. A usually reliable source told me the math on the teacher licensure exam is at no more than the fifth grade level. The reason is that too many ed school grads will fail if asked to perform beyond that.
95
posted on
12/30/2006 11:04:18 AM PST
by
freespirited
(Honk for disbarment of Mike Nifong.)
To: evad
I didn't say it worked in all cases; only when the numerator is 1 and there are only two fractions.
The invert rule? 2/3 becomes 3/2 or 1/7 becomes 7/1; 3x7=21; 2x7=14; 7x3=21; 7x2=14 or the answer is 14/21?
96
posted on
12/30/2006 11:04:40 AM PST
by
Old Professer
(The critic writes with rapier pen, dips it twice, and writes again.)
To: durasell
It's expensive to live in NYC--I assume the salaries are high also so one can afford to live in NYC? or am I just uninformed?
To: patton
Thank God I got it right! lol.
To: achilles2000
This thread convinces me that FReepers will argue about anything . . .
Fraction factions?
99
posted on
12/30/2006 11:09:15 AM PST
by
BraveMan
To: SoftballMominVA
NYC does this thing where they either get teachers from locals or they import. The import thing is interesting. They basically steal young teachers with advanced degrees from Texas, California, etc. set them up with an apartment to get them started out, and put them into low performing schools. So, the teachers go from earning $25,000 to about $50,000. After about five or ten years, those teachers leave to work in the suburbs, where their salary jumps from $50,000 or $60,000 to $80,000 or $90,000.
The same thing happens with cops, as well. They put in a couple years and leave for the burbs fully trained.
On the other hand, there are NYC teachers who become "addicted" to the action. I know a few.
100
posted on
12/30/2006 11:10:20 AM PST
by
durasell
(!)
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