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Guy Courchesne

Joined: 10 Mar 2003 Posts: 9650 Location: Mexico City
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Posted: Sun Feb 27, 2005 3:59 am Post subject: Topic to get teachers talking |
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10 + 2 X 10 = ? |
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some waygug-in
Joined: 07 Feb 2003 Posts: 339
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Posted: Sun Feb 27, 2005 4:05 am Post subject: |
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It's a trick, right? |
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Belmont
Joined: 12 Jul 2003 Posts: 125 Location: Southern California
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Posted: Sun Feb 27, 2005 5:32 am Post subject: |
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I thought "live" was the verb. Also, give us a clue about the math problem, whose sum is 120, but there is more? |
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Belmont
Joined: 12 Jul 2003 Posts: 125 Location: Southern California
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Posted: Sun Feb 27, 2005 5:33 am Post subject: |
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I thought "live" was the verb. Also, give us a clue about the math problem, whose sum is 120, but there is more? |
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Guy Courchesne

Joined: 10 Mar 2003 Posts: 9650 Location: Mexico City
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Posted: Sun Feb 27, 2005 5:37 am Post subject: |
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Just a topic to get people talking.
You say 120? OK. |
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vochinch

Joined: 24 Jan 2005 Posts: 13 Location: Brno, Czech Republic (soon)
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Posted: Sun Feb 27, 2005 6:17 am Post subject: |
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If I remember correctly, in a problem such as this, lacking parenthesis, you do the higher-order calculation first, which would yield 30 as an answer. |
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Stephen Jones
Joined: 21 Feb 2003 Posts: 4124
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Posted: Sun Feb 27, 2005 6:22 am Post subject: |
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Yes. let's have a fascination discussion on the importance of parentheses - I think not!
Incidentally different computer programs may well process the operations in a different order. Excel will give the answer 30 but Calculator will give the answer 120 |
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denise

Joined: 23 Apr 2003 Posts: 3419 Location: finally home-ish
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Posted: Sun Feb 27, 2005 7:03 am Post subject: |
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vochinch wrote: |
If I remember correctly, in a problem such as this, lacking parenthesis, you do the higher-order calculation first, which would yield 30 as an answer. |
I haven't taken a math class since high school--got out of that requirement in college somehow--but I remember learning this little maxim, too. I also go with 30.
Here's another topic, one which launched me into a 30-minute argument with a fellow teacher, followed by several follow-up arguments over the next few days (and which later provided me a topic for a paper I wrote in grad school):
The tomato: a fruit or a vegetable?
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Kent F. Kruhoeffer

Joined: 22 Jan 2003 Posts: 2129 Location: 中国
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Posted: Sun Feb 27, 2005 7:33 am Post subject: finally a topic I can get my teeth into! |
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Agreed; the answer to the first question is: 30
The answer to the second question is: fruit
And now, this stunning historical portrait of the tomato:
Among the greatest contributions to world civilization made by the early inhabitants of the Americas are plant foods such as the potato and squash. The tomato, whose name comes ultimately from the Nahuatl language spoken by the Aztecs and other groups in Mexico and Central America, was another important contribution. When the Spanish conquered this area, they brought the tomato back to Spain and, borrowing the Nahuatl word tomatl for it, named it tomate, a form shared in French, Portuguese, and early Modern English. Tomate, first recorded in 1604, gave way to tomato, a form created in English either because it was assumed to be Spanish or under the influence of the word potato. As is well known, people at first resisted eating this New World food because its membership in the nightshade family made it seem potentially poisonous, but it is now is an important element of many world cuisines.
tomato
n 1: mildly acid red or yellow pulpy fruit eaten as a vegetable 2: native to South America; widely cultivated in many varieties.
Source: The American Heritage Dictionary of the English Language, Fourth Edition, Copyright � 2000 by Houghton Mifflin Company |
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denise

Joined: 23 Apr 2003 Posts: 3419 Location: finally home-ish
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Posted: Sun Feb 27, 2005 7:40 am Post subject: |
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Kent--
I agree with you about the tomato. My colleague had a different understanding of it, though.
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Kent F. Kruhoeffer

Joined: 22 Jan 2003 Posts: 2129 Location: 中国
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Posted: Sun Feb 27, 2005 7:44 am Post subject: ?? prize money ?? |
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I just wanna know if there's a prize for 2 correct answers?
Guy? Tell me what I've won !!!  |
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Guy Courchesne

Joined: 10 Mar 2003 Posts: 9650 Location: Mexico City
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Posted: Sun Feb 27, 2005 3:05 pm Post subject: |
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You win KFK!! A big bucket of tomatli is on the way to your house...
I was curious to know what answers would come up. My wife and I were watching a game show when a similar question came up. I said 30, thinking of all that order of operations stuff from elementary school. She was adamant that the answer was 120.
BEDMAS I think went the tip to remember.
Yes, I spent Saturday night watching games shows and arguing math....that is a call for help.  |
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Stephen Jones
Joined: 21 Feb 2003 Posts: 4124
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Posted: Sun Feb 27, 2005 8:40 pm Post subject: |
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Now, if I saw it written, I would give the answer 30.
But if it was an oral question, in the form "ten plus two times ten", I would give the answer 120 because if you wished the alternative you would say "ten plus quantity two times ten"
Anybody who has had the misfortune to have taught KFUPM Listening will get that right automatically.
Now perhaps we can change the topic to something wild and passionate , such as the weather or patio doors? |
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Guy Courchesne

Joined: 10 Mar 2003 Posts: 9650 Location: Mexico City
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Posted: Sun Feb 27, 2005 9:24 pm Post subject: |
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I remember a case in the US (or was it Canada?) where a woman had won a prize from McDonald's and completed the SKILL TESTING QUESTION on the little game card. It was similar to the 10 + 2 X 10 example. She answered using order of operations, but McDonald's had rejected it. She fought McDonald's in court and won, so now, when you see that silly equation on the back of game cards, the brackets are always there. |
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nomadamericana
Joined: 18 Dec 2004 Posts: 146 Location: Minneapolis, MN
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Posted: Sun Feb 27, 2005 9:39 pm Post subject: |
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I say it is 30 but my first instinct was to say 120. Is there a right answer???
~NA |
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