4.18容量的等效公制单位

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  容量的等效公制单位

  

  [Figure 1]

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  Devon works for a catering company. She is preparing the food for a party with 100 guests. Before she goes shopping for ingredients, she has to calculate how much food they will be making. She usually makes 375 milliliters of soup per person. How many liters of soup will Devon be making for the party?
  ::德文为一家餐饮公司工作。 她正在为一个有100名客人的宴会准备食物。 在她去购物之前, 她必须计算他们要做多少食物。 她通常每人做375毫升的汤。 德文将为派对做多少杯汤?

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  In this concept, you will learn to identify  equivalent  metric units of  capacity .
  ::在这个概念中,你们将学会确定相当的计量能力单位。

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  Metric Units of Capacity
  ::计量能力单位

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  Capacity  is the total amount of liquid an object can contain. Capacity is often measured using the metric units of  liter  (L) and  milliliter  (mL). Note that milliliter also uses the metric prefix of “milli-” to indicate that 1 milliliter is a thousandths of a liter. Look at the equivalent metric units of capacity.
  ::容量通常使用公升(L)和毫升(mL)的度量单位进行测量。请注意,毫升还使用“毫升-”的度量前缀来表示1毫升是一升的千分之一。看看等量的容量单位。

  $$\begin{array}{r}\begin{array}{rcl}1liter(L)& =& 1,000milliliters(mL)\\ 1milliliter(mL)& =& 0.001liter(L)\end{array}\end{array}$$

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  When converting from a larger unit to a smaller unit, multiply by 1,000.
  ::从较大单位转换为较小单位时,乘以1 000。

  $$\begin{array}{r}1L\times 1,000=1,000mL\end{array}$$

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  When converting from a smaller unit to a larger unit, divide by 1,000.
  ::从较小单位转换为较大单位时,除以1 000。

  $$\begin{array}{r}1mL÷1,000=0.001L\end{array}$$

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  Remember that multiplying by 1,000 is also the same as moving the decimal point 3 places to the right. Dividing by 1,000 is also the same as moving the decimal point 3 places to the left.
  ::记住乘以 1 000 与向右移动小数点 3 相同。 乘以 1 000 与向左移动小数点 3 相同。

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  Here is a conversion problem.
  ::这是一个转换问题。

  $$\begin{array}{r}4L=\underset{\_}{}mL\end{array}$$

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  Convert liters to milliliters. Liters are larger than milliliters, so multiply by 1,000.
  ::升数转换为毫升。 升数大于毫升, 所以乘以 1 000 。

  $$\begin{array}{r}4L\times 1,000=4,000mL\end{array}$$

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  4 liters is equivalent to 4,000 milliliters.
  ::四升等于四千毫升。

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  Examples
  ::实例

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  Example 1
  ::例1

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  Earlier, you were given a problem about Devon at the catering company.
  ::早些时候,在餐饮公司,你对德文有意见

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  Devon needs to find out how many liters of soup she needs for 100 guests if each serving is 375 milliliters.
  ::德文需要找出100个客人需要多少公升的汤 如果每个服务是375毫升的话

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  First, find the total amount of what she needs to make in milliliters. Multiply 350 mL by 100.
  ::首先, 找到她需要做的毫升的总量。 乘以 350 毫升乘以 100 。

  $$\begin{array}{r}350mL\times 100=35,000mL\end{array}$$

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  Then, convert 35,000 milliliters to liters. A smaller unit is converting to a larger unit. Divide 35,000 mL by 1,000.
  ::然后,将35 000毫升升转换为升。一个较小的单位正在转换为更大的单位。35 000毫升除以1 000。

  $$\begin{array}{r}35,000ml÷1,000=35L\end{array}$$

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  Devon will need to make 35 liters of soup.
  ::德文需要做35升汤

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  Example 2
  ::例2

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  Find the equivalent unit.
  ::找到相等单位。

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  Jamie is transferring a liquid from one container to another. She transfers 2.5 liters. How many milliliters did she transfer?
  ::Jamie将液体从一个容器转移到另一个容器。她将2.5升的液体转移到另一个容器。她转移了多少毫升?

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  First, identify the unit conversion, 2.5 liters to milliliters. A larger unit is converting to a smaller unit.
  ::首先,确定单位转换,2.5升改为毫升,较大的单位转换成较小的单位。

  $$\begin{array}{r}2.5L=\underset{\_}{}mL\end{array}$$

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  Then, multiply by 1,000. You can also move the decimal point 3 places to the right.
  ::然后,乘以1000。您也可以将小数点3移到右边。

  $$\begin{array}{r}2.5L\times 1,000=2,500mL\end{array}$$

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  Jamie transferred 2,500 milliliters of liquid.
  ::杰米转移了2500毫升液体

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  Find the equivalent units.
  ::找到等效单位。

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  Example 3
  ::例3

  $$\begin{array}{r}5liters=\underset{\_}{}milliliters\end{array}$$

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  First, identify the unit conversion, 5 liters to milliliters. A larger unit is converting to a smaller unit.
  ::首先,确定单位转换,5升到毫升,一个更大的单位正在转换成一个较小的单位。

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  Then, multiply by 1,000.
  ::然后乘以1000乘以1000

  $$\begin{array}{r}5L\times 1,000=5,000mL\end{array}$$

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  5 liters is equivalent to 5,000 milliliters.
  ::5升等于5 000毫升。

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  Example 4
  ::例4

  $$\begin{array}{r}2,000milliliters=\underset{\_}{}liters\end{array}$$

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  First, identify the unit conversion, 2,000 milliliters to liters. A smaller unit is converting to a larger unit.
  ::首先,确定单位转换,2 000毫升升为升,一个较小的单位正在转换为更大的单位。

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  Then, divide by 1,000.
  ::然后除以1000

  $$\begin{array}{r}2,000mL÷1,000=2L\end{array}$$

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  2,000 milliliters is equivalent to 2 liters.
  ::2 000毫升等于2升。

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  Example 5
  ::例5

  $$\begin{array}{r}4,500milliliters=\underset{\_}{}liters\end{array}$$

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  First, identify the unit conversion, 2,000 milliliters to liters. A smaller unit is converting to a larger unit.
  ::首先,确定单位转换,2 000毫升升为升,一个较小的单位正在转换为更大的单位。

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  Then, divide by 1,000.
  ::然后除以1000

  $$\begin{array}{r}4,500mL÷1,000=4.5L\end{array}$$

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  4,500 milliliters is equivalent to 4.5 liters.
  ::4 500毫升等于4.5升。

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  Review
  ::回顾

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  Find the equivalent units.
  ::找到等效单位。

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  1. 4500 mL = _______ L
     ::4500毫升= °L
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  2. 6900 mL = _______ L
     ::6900毫升= 升
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  3. 4400 mL = _______ L
     ::4400毫升=°L
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  4. 5200 mL = _______ L
     ::5200毫升= 升
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  5. 1200 mL = _______ L
     ::1200 mL = L
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  6. 1800 mL = _______ L
     ::1800毫升=°L
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  7. 2900 mL = _______ L
     ::2900毫升=°L
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  8. 1300 mL = _______ L
     ::1300毫升=--升
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  9. 2700 mL = _______ L
     ::2700毫升=°L
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  10. 3 L = _______ mL
      ::3 L = 毫升
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  11. 5.5 L = _______ mL
      ::5.5 L = 毫升
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  12. 8 L = _______ mL
      ::8升=毫升
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  13. 9.3 L = _______ mL
      ::9.3 L = 毫升
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  14. 34.5 L = _______ mL
      ::34.5 L = 毫升
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  15. 65.5 L = _______ mL
      ::65.5 L = 毫升

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  Review (Answers) 
  ::回顾(答复)

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  Click   to see the answer key or go to the Table of Contents and click on the Answer Key under the 'Other Versions' option.
  ::单击可查看答题键, 或转到目录中, 单击“ 其他版本” 选项下的答题键 。

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  Resources
  ::资源