2.6 引入百分比-interactive

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  采用百分比

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  Percents as Fractions
  ::百分比作为分数

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  are often expressed as fractions. Use the interactive to explore how percents relate to rates. Throughout this lesson, you will represent quantities with percents.
  ::通常以分数表示。 使用互动来探索百分比与比率的关系。 在整个课程中, 您将用百分比表示数量 。

   

  

  INTERACTIVE

  Percents and Fractions

  

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  • Move the red point to change the value of the percent and fraction.
    ::移动红点以改变百分比和分数的值。
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  • Try to match the percent and fraction with the descriptor above them.
    ::试着将百分比和分数与上面的描述符匹配 。

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  Choose the answers that are examples of equivalent values according to the interactive.
  ::选择根据交互性选择等值示例的答案。

  Select all that apply

  a

  0% = $\begin{align*}\frac{0}{100}\end{align*}$

  b

  30% = $\begin{align*}\frac{3}{100}\end{align*}$

  c

  70% = $\begin{align*}\frac{70}{100}\end{align*}$

  d

  1% = $\begin{align*}\frac{100}{100}\end{align*}$

  e

  50% = $\begin{align*}\frac{50}{100}\end{align*}$

   

   

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  How much   of a century have you lived?
  ::你活了多少个世纪?

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  A century is 100 years long. Use the interactive below to express how long you’ve lived as a percent compared to a century.
  ::一个世纪长达100年。 使用下面的交互式来表达您与一个世纪相比的百分率寿命。

   

  

  INTERACTIVE

  Percent of Century

  

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  • Input your birthday to see what percentage of your current lifetime is in one century. The interactive will only use your birthday if it is on or after 01/01/2000.
    ::输入您的生日, 以了解您当前一生中有多少百分率是在一个世纪。 互动只使用您在 1 01/01/ 2000 或 1 01 / 2000 之后的生日 。
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  • 100% means you have lived for 100 years while 10% means you have only lived for 10 years.
    ::100%意味着你已经活了100年 而10%意味着你只活了10年

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  The interactive shows the years from 2000 to 2100 which is one century. What is the year that represents 50% of this century?
  ::互动展示了2000年至2100年这一世纪的岁月。 占本世纪50%的年份是什么?

  a

  $\begin{align*}\frac{50}{100}\end{align*}$

  b

  2000

  c

  1000

  d

  2050

   

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  CK-12 PLIX Interactive
  ::CK-12 PLIX 交互式互动

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  Use the PLIX interactive to explore how far a climber scales a cliff and answer the first 3 questions. The last 2 questions are a bit challenging but you can give them a try!
  ::使用 PLIX 互动来探索攀爬者对悬崖的比重, 并回答前三个问题。 最后两个问题有点困难, 但是你可以尝试一下 !

   

   

   

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  What percentage of the football field  do you run with a parachute?
  ::你用降落伞跑的足球场的百分比是多少?

  

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  Some runners practice resistance training by sprinting with a parachute tied to their waist.  Running with a parachute is not easy. It is recommended for runners to start with a shorter sprint and work their way up to longer distances. 
  ::有些跑者用腰上绑着降落伞冲刺练习抵抗训练。 用降落伞跑起来并不容易。 建议跑者先用短短的冲刺,然后跑到更远的地方。

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  In this interactive, a runner is sprinting on a football field and the field is 100 yards long. Convert the number of yards runner runs into what percent of the field they covered.
  ::在此互动中, 赛跑者正在足球场上冲刺, 球场长100码。 转换赛跑场数会跑到他们所覆盖的球场的百分之几 。

   

  

  INTERACTIVE

  Parachute Running

  

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  • Input a whole number distance between 0 and 100 that the football player will run across. 
    ::输入整个数字的距离0到100之间 球员将穿越。

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  How much do I weigh on another planet?
  ::在另一个星球上我需要承受多少重量?

  

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  Depending on which planet you are on, you would weigh a different amount .  Your weight depends on the size and mass of the planet, , and your own mass.  
  ::取决于您所依赖的行星,您将承受不同的重量。您的重量取决于该行星的大小和质量, 以及您自己的质量。

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  In the next interactive, use ratios to convert how much you weigh on Earth to how much you would weigh on different planets. If your weight on Earth represents 100%, determine what percentage is your weight on other planets using the questions that follow.
  ::在下一次互动中,使用比率将地球的重量与不同行星的重量相比转换成多少。如果你在地球上的重量代表了100%,则使用以下问题来确定其他行星的重量百分比。

   

  

  INTERACTIVE

  Your Weight on Other Planets!

  

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  • Click on a planet and input your weight here on Earth to see how much you would weigh there.
    ::点击一个行星,输入你的重量 在地球上,看看你会有多重。

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     Summary
  ::摘要

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  • A percent is a rate per 100.
    ::A%是每100人中的比例。
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  • A percent can be represented by a fraction with a denominator equal to 100.
    ::以分母等于100的分母代表一个百分比。