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发帖数: 40861 | 1 【 以下文字转载自 Parenting 讨论区 】
发信人: ananpig (●○ 围棋数学一把抓的安安猪), 信区: Parenting
标 题: 美国数学教育发展简史(1950～)zz
发信站: BBS 未名空间站 (Sun Oct 5 23:33:57 2014, 美东)
美国数学教育发展简史(1950～)zz
Teaching Math in 1950's — A logger sells a truckload of lumber for $100. Hi
s cost of production is 4/5 of the price. What is his profit ?
Teaching Math in 1960's — A logger sells a truckload of lumber for $100. Hi
s cost of production is 4/5 of the price, or $80. What is his profit?
Teaching Math in 1970's — A logger exchanges a set "L" of lumber for a set
"M" of money. The cardinality of set "M" is 100. Each element is worth one d
ollar. Make 100 dots representing the elements of the set "M". The set "C",
the cost of production, contains 20 fewer points than set "M." Represent the
set "C" as a subset of set "M" and answer the following question: What is t
he cardinality of the set "P" for profits?
Teaching Math in 1980's — A logger sells a truckload of lumber for $100. Hi
s cost of production is $80 and his profit is $20. Your assignment: Underlin
e the number 20.
Teaching Math in 1990's — A logger cuts down a beautiful forest because he
is selfish and inconsiderate and cares nothing for the habitat of animals or
the preservation of our woodlands. He does this so he can make a profit of
$20. What do you think of this way of making a living? Topic for class parti
cipation after answering the question: How did the birds and squirrels feel
as the logger cut down their homes? (There are no wrong answers, and if you
feel like crying, it's ok.)
Teaching Math in 1996 — By laying off 40% of its loggers, a company improve
s its stock price from $80 to $100. How much capital gain per share does the
CEO make by exercising his stock options at $80? Assume capital gains are n
o longer taxed, because this encourages investment.
Teaching Math in 1997 — A company out-sources all of its loggers. The firm
saves on benefits, and when demand for its product is down, the logging work
force can easily be cut back. The average logger employed by the company ea
rned $50,000, had three weeks vacation, a nice retirement plan and medical i
nsurance. The contracted logger charges $50 an hour. Was outsourcing a good
move?
Teaching Math in 1999 — A laid-off logger serving time in Folsom for going
postal and doing some bad things is now being trained as a COBOL programmer
in order to work on Y2K projects. What is the probability that the automatic
cell doors will open on their own as of 00:01, 01/01/00?
Teaching Math in 2005 — Un le?ador vende una carga de madera por $100. El c
osto de producción es.... Press one to hear the question in English. | B*******c
发帖数: 5056 | 2 美国数学教育发展简史（1950～）
在1950年的数学教学 - 记录器卖木材的卡车为100元。您好
生产号成本是价格的五分之四。什么是他的利润？
在1960年的数学教学 - 记录器卖木材的卡车为100元。您好
生产号成本是价格，或者$80的五分之四。什么是他的利润？
一组木材的记录交流了一组“L” - 在1970年的数学教学
钱的“M”。集“M”的基数是100，每个元素都是值得一个D
ollar。使100个点表示所设置的“M”的元素。这组“C”
生产成本，包含了比集“M”少20分代表
设置“C”作为集“M”的一个子集，并回答以下问题：什么是吨
他设定的“P”为利润基数？
在1980年的数学教学 - 记录器卖木材的卡车为100元。您好
生产号成本是80美元和他的利润是20美元。你的任务：Underlin
Ë数20。
在1990年的数学教学 - 记录器减少了一个美丽的森林，因为他
是自私，不体贴和关心什么动物或栖息地
我们林地的保护。他这样做，这样他可以从中获利的
20美元。你觉得这种方式谋生呢？主题类汉邦
鸟儿和松鼠有什么感觉：回答这个问题后cipation
作为记录砍下他们的家园？ （有没有错误的答案，如果你
想哭，就ok了。）
1996年数学教学 - 通过裁员，其伐木工40％，该公司提高
Š其股价由80元至100元。每股多少资本收益的不
首席执行官让通过行使自己的股票期权为80元？假设资本收益为正
Ø再征税，因为这鼓励投资。
1997年数学教学 - 以A公司外源所有的记录器。该公司
节省的好处，并在其产品的需求下降，伐木工作
力可以容易地减少。由EA公司所采用的平均记录
rned50000元，有三个星期的假期，一个不错的退休计划及医疗í
nsurance。合同记录收费一小时50元。外包是一个很好的
动？
1999年数学教学 - 一个下岗记录服务时间福尔松换去
邮政和做一些不好的事情，现在被训练作为一个COBOL程序员
为了工作在千年虫项目。什么是概率自动
牢房的门会自己开为00:01，01/01/00？
2005年数学教学 - 元乐ADOR vende UNA carga去马德拉POR100元。萨尔瓦多ç
osto德producciónES....按下一个听到英文的问题。 |
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