章节大纲

  • Mustafa is planning to run a 5k race. In order to prepare for the race, he has been running each day. At the end of the first week, he runs 575   without stopping. He tries to figure out how that translates in kilometers so he converts 575 meters to kilometers. How many kilometers are equal to 575 meters?
    ::Mustafa计划进行一场5千米的比赛。 为了准备比赛,他每天都在赛跑。 第一周结束时,他连续跑575次,没有停停。他试图弄清楚这如何用公里来翻译,所以他将575米转换为公里。多少公里等于575米?

    In this concept, you will learn how to find  equivalent  metric measurements.

    ::在这个概念中,你会学会如何找到相当的衡量尺度。

    Converting Using Decimal Numbers
    ::使用十进制数字转换

    Sometimes when you convert metric units you don’t have a whole number answer. When this happens, you end up with an answer that is a decimal. 
    ::有时,当转换计量单位时,您没有完整的数字答案。当这种情况发生时,最后的答案是小数点。

    Let's work through an example.
    ::让我们通过一个例子来工作。

    1 mm = ______ cm
    ::1毫米=厘米

    Since you are converting a smaller unit to a larger unit, you are going to divide. There are 10 mm in one  centimeter , so you are going to divide 1 by 10. You are dividing 1 whole into 10 parts.
    ::由于您正在将一个较小的单位转换成一个更大的单位, 您将会分裂。 一厘米内有 10 毫米, 所以您会将 1 除以 10 。 您会将 1 整数分成 10 个部分 。

    ÷  10  =  0.1 (one-tenth)
    ::1 10 = 0.1 (十分之一)

    The answer is 0.1 cm.
    ::答案是0.1厘米

    Examples
    ::实例

    Example 1
    ::例1

    Earlier, you were given a problem about Mustafa and the race.
    ::早些时候,你被问及穆斯塔法和比赛的问题。

    What is 575 meters in kilometers?
    ::575米是多少?

    Convert 575 m to km
    ::转换575米至公里

    575 m = _______ km
    ::575米=_____公里

    First, determine if you are going from a smaller unit to a larger unit or a larger unit to a smaller unit.
    ::首先,确定您是否正在从一个较小的单位转到一个较大的单位,或者从一个更大的单位转到一个较小的单位。

    Smaller to larger
    ::从小到大

    Next, use the appropriate rule.
    ::接下来,使用适当的规则。

    575  ÷  1000

    Then, write the value.
    ::然后,写下价值。

    0.575

    The answer is 0.575. Mustafa runs 0.575 kilometers.
    ::答案是0.575 穆斯塔法跑0.575公里

    Example 2
    ::例2

    Convert 1 m to km.
    ::将1米转换为1公里。

    1 m = ______ km
    ::1米=公里

    First, determine if you are going from a smaller unit to a larger unit or from a larger unit to a smaller unit.
    ::首先,确定您是从一个较小的单位转到一个较大的单位,还是从一个较大的单位转到一个较小的单位。

    Smaller to larger
    ::从小到大

    Next, use the appropriate rule.
    ::接下来,使用适当的规则。

    ÷  1000 = 0.001

    Then, write the value.
    ::然后,写下价值。

    0.001

    The answer is 0.001.
    ::答案是0.001。

    Example 3
    ::例3

    Convert 2 m to km.
    ::2米到公里的转换。

    2 m = ______ km
    ::2米=公里

    First, determine if you are going from a smaller unit to a larger unit or from a larger unit to a smaller unit.
    ::首先,确定您是从一个较小的单位转到一个较大的单位,还是从一个较大的单位转到一个较小的单位。

    Smaller to larger
    ::从小到大

    Next, use the appropriate rule.
    ::接下来,使用适当的规则。

    ÷  1000

    Then, write the value.
    ::然后,写下价值。

    0.002

    The answer is 0.002 km.
    ::答案是0.002公里

    Example 4
    ::例4

    Convert 8 mm to cm.
    ::转换 8 毫米到厘米

    8 mm = ______ cm
    ::8毫米 = 厘米

    First, determine if you are going from a smaller unit to a larger unit or from a larger unit to a smaller unit.
    ::首先,确定您是从一个较小的单位转到一个较大的单位,还是从一个较大的单位转到一个较小的单位。

    Smaller to larger
    ::从小到大

    Next, use the appropriate rule.
    ::接下来,使用适当的规则。

    ÷  10

    Then, write the value.
    ::然后,写下价值。

    0.8

    The answer is 0.8 cm.
    ::答案是0.8厘米

    Example 5
    ::例5

    Convert 4 cm to m.
    ::转换 4 厘米到 m.

    4 cm = ______ m
    ::4厘米=_____米

    First, determine if you are going from a smaller unit to a larger unit or from a larger unit to a smaller unit.
    ::首先,确定您是从一个较小的单位转到一个较大的单位,还是从一个较大的单位转到一个较小的单位。

    Smaller to larger
    ::从小到大

    Next, use the appropriate rule.
    ::接下来,使用适当的规则。

    ÷  100

    Then, write the value.
    ::然后,写下价值。

    0.04

    The answer is 0.04.
    ::答案是0.04

    Review
    ::回顾

    Write each decimal conversion. Round to the nearest hundredth when necessary.
    ::写下每个小数转换。 必要时, 圆到最接近的百分百 。

    1. 1 mm = ______ cm
      ::1毫米=厘米
    2. 5 mm = ______ cm
      ::5毫米 = 厘米
    3. 10 mm = ______ cm
      ::10毫米 = 厘米
    4. 15 mm = ______ cm
      ::15毫米 = 厘米
    5. 8 cm = ______ m
      ::8厘米=_____米
    6. 9 cm = ______ m
      ::9厘米=_____米
    7. 11 cm = ______ m
      ::11厘米=_____米
    8. 22 cm = ______ m
      ::22厘米=_____米
    9. 12 m = ______ km
      ::12米=_____公里
    10. 8 m = ______ km
      ::8米=_____公里
    11. 22 mm = ______ cm
      ::22毫米 = 厘米
    12. 225 mm = ______ cm
      ::225毫米 = 厘米
    13. 543 mm = ______ cm
      ::543毫米 = 厘米
    14. 987 mm = ______ cm
      ::987毫米 = 厘米
    15. 1234 mm = ______ cm
      ::1234毫米 = 厘米

    Review (Answers) 
    ::回顾(答复)

    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 。

    Resources
    ::资源