Section outline


  • lesson content

    Erin is redecorating her living room and has some things she wants to measure in the room. She needs to go to the hardware store to purchase some tools, one of which is the best tool to measure the objects in her living room. She needs help deciding which tool is the most useful measuring tool for her to buy.
    ::她需要去五金店购买一些工具,其中之一是衡量她客厅内物品的最佳工具。她需要帮助决定哪一种工具是她购买最有用的计量工具。

    In this concept, you will learn about different tools that are used to measure both customary and metric units of measurements.
    ::在这个概念中,你们将了解用来衡量习惯和衡量计量单位的不同工具。

    Tools for Measuring
    ::衡量和衡量工具的工具

    Whether you are measuring the  length  of items using the  customary system  of measurement or the  metric system  of measurement, you will still have to decide which measurement tool is the best one to use.
    ::无论是使用习惯测量系统还是衡量系统衡量项目长度,仍须决定哪些计量工具是最佳使用工具。

    These are the most commonly used tools for measurement:
    ::这些是最常用的衡量工具:

    • Rulers
      ::标尺
    • Tape measures
      ::磁磁带措施
    • Yard  sticks
      ::场棍棒
    • Meter  sticks
      ::计量棒棒

    Rulers  are used all the time in mathematics. Rulers are used to measure things that are small. Most rulers show both customary units of measurement like  inches  and metric units of measurement, such as the  millimeter  and the  centimeter .
    ::标尺一直用于数学。标尺用来测量小的东西。 多数标尺显示的习惯测量单位, 如英寸和计量单位, 如毫米和厘米。

    You can measure a small item in customary units or metric units.
    ::您可以在习惯单位或计量单位中测量小项目。

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    In customary units, the barrette is about 2 inches long. In metric units, it is a little over 5   long. If an item that is being measured fits on a piece of paper, a ruler is probably the best tool to use.
    ::在习惯单位中, 单张长度约为 2 英寸。 在量度单位中, 单张长度略高于 5 英寸 。 如果测量的物品符合纸面上的尺寸, 则标尺可能是使用的最佳工具 。

    Another tool to measure length is a  tape measure.  They are used to measure many of the distances that are too long for a ruler to measure easily and they are flexible, not rigid. Examples of things you would use a tape measure for could be the distance across a room or an object that is very long like a large picture frame. Tape measures most commonly show   and feet, but sometimes a tape measure has both customary units and metric units marked.
    ::测量长度的另一个工具是磁带测量。 它们用来测量许多距离, 这些距离对于标尺来说太长, 无法轻易测量, 它们是灵活的, 不是僵硬的 。 您使用磁带测量的示例可以是房间的距离, 或者像大图框一样长的物体 。 磁带测量最常用的显示和脚, 但有时磁带测量有习惯单位和测量单位标记 。

    A  yard stick  measures things by the yard and only shows customary units of inches and feet. Since there are three feet in a yard, a yard stick could be used for things that are longer than a piece of paper, but not too long. Some of the things that you could measure with a tape measure we could also measure with a yard stick, but it depends on if a rigid measurer like a yard stick is appropriate versus the flexible tape measure. 
    ::院子棍在院子里测量事物, 并且只显示惯用的英寸和脚单位。 由于院子有三英尺长, 院子棍可以用于比一张纸长但不会太长的东西。 有些用胶带测量到的东西, 我们也可以用院子棍测量, 但它取决于院子棍这样的硬性测量器是否适合软性磁带测量器。

    A  meter stick  measures one meter and shows only metric units of measurement of millimeters and centimeters. Meter sticks are used to measure objects that are larger than a piece of paper. Remember that you can use centimeters and millimeters if the object is smaller than a piece of paper. Those items are easily measured with a ruler. A meter stick is a little over 3 feet long, because a meter is approximately 3.2 feet. A meter stick closely compares to a yard stick.
    ::一米棒测量一米,只显示毫米和厘米的计量单位。米棒用于测量大于一块纸的物体。记住,如果对象小于一块纸,可以使用厘米和毫米。这些物品很容易用标尺测量。一个米棒小于3英尺,因为一个计尺大约为3.2英尺。一个米棒与一个院子棒比较。

    For instances where a yard stick would be used for customary units, a meter stick would be used to measure metric units. For example, when measuring a table length, a yard stick would measure customary length well and a meter stick would alternately measure metric length well.
    ::对于习惯单位使用院子棍的情况,将使用米棍测量计量计量单位。 例如,在测量表长度时,院子棍测量习惯长度的井,米棒测量长度的交替。

    Examples
    ::实例

    Example 1
    ::例1

    Earlier, you were given a problem about Erin and her redecorating project in her living room.
    ::早些时候,你得到一个问题 关于艾琳 和她的重新装修项目 在她的客厅。

    She wants to buy the most useful measuring tool she can for measuring different objects in her living room. 
    ::她想买最有用的测量工具 用来测量客厅里的不同物品

    First, Erin needs to think about the different objects she may measure such as furniture, tables, etc.
    ::首先,艾琳需要考虑她可以测量的不同物体,如家具、表格等。

    Next, Erin needs to consider what units most of the objects would be measured in. For objects of these sizes, she will most likely be measuring in feet or maybe yards or  . 
    ::接下来,艾琳需要考虑大多数天体的单位。对于这些大小的天体,她最有可能是用脚来测量,或许是用院子来测量。

    Then, Erin needs to choose a tool at the hardware store that can measure feet and perhaps even yards to meters. She decides on a tape measure for its flexibility and versatility with different units of measurement.
    ::然后,艾琳需要在五金商店选择一种工具,可以测量脚足,甚至可以测量到几米。她决定用磁带测量其灵活性和多功能性,使用不同的测量单位。

    The answer is tape measure.
    ::答案是磁带测量

    Erin buys a tape measure to help get her redecorating started.
    ::艾琳买了个磁带 帮助她重新装修

    Example 2
    ::例2

    Which tool would you use to measure the length of a bug that needs to be seen with a magnifying glass?
    ::您要用哪一种工具来测量需要用放大镜显示的错误长度 ?

    First, think about the bug and its size compared to units of measurement and different tools. 
    ::首先,想一想虫子及其大小,与测量单位和不同工具相比。

    Next, consider what unit would be most appropriate so you can determine the best tool. If the bug is so tiny that it needs to be seen with a magnifying glass, then it is probably smaller than inches and centimeters. The smallest unit to measure would be millimeters.
    ::接下来,请考虑哪个单位最合适, 以便您确定最佳工具 。 如果错误如此小, 以至于需要用放大镜来显示它, 那么它可能比英寸和厘米小。 最小的单位是毫米 。

    Then, match a tool with the unit you are using to measure the object. The best tool that contains millimeters is the ruler.
    ::然后,将一个工具与您用来测量对象的单位匹配。 包含毫米的最佳工具是标尺 。

    The answer is a ruler.
    ::答案是一个统治者。

    Example 3
    ::例3

    What tool would you use to measure a toothpick?
    ::你会用什么工具来衡量牙签?

    First, consider the object by looking at it or picturing it in your mind.
    ::首先,考虑一下对象,看一看它,或者想象一下它。

    Next, think about what unit would be best to measure the object. A toothpick is a small object that would be too small for a  foot . The smaller units of inches, centimeters or millimeters would be more appropriate. 
    ::接下来,请想想哪个单位最适合测量物体。牙签是一个小物体,小到脚太小。小的英寸、厘米或毫米更合适。

    Then, match a tool with the unit you would use to measure the object. Whether inches, centimeters, or millimeters are used as the unit of measurement, the ruler is the tool that will work best.
    ::然后,将一个工具与您用来测量对象的单位匹配。无论英寸、厘米或毫米被用作测量单位,标尺是最有效的工具。

    The answer is ruler.
    ::答案是统治者。

    Example 4
    ::例4

    What tool would you use to measure the length of a room?
    ::您用什么工具来衡量房间的长度 ?

    First, picture the object in your mind or look at the space.
    ::首先,想象一下你脑中的物体 或者看看空间。

    Next, think about what unit of measurement makes the most sense for measuring a wall. You can rule out very small units like inches, centimeters and millimeters. We can also rule out really large units like miles and kilometers. The most appropriate units are either feet, yards or meters. 
    ::接下来,请想一想什么测量单位对测量墙壁最有意义。 您可以排除非常小的单位, 如英寸、 厘米和毫米。 我们还可以排除真正的大单位, 如英里和公里。 最合适的单位是英尺、 码或米。

    Then, determine which tool can be used to measure those units. Most tape measures contain both customary and metric units, but it's also important to think that yards and meters are quite similar so picking one or the other is appropriate. 
    ::然后,确定哪些工具可以用来测量这些单位。大多数磁带测量都包含习惯和计量单位, 但同样重要的是要考虑 码和米非常相似, 所以选择一个或另一个是合适的。

    The answer is tape measure.
    ::答案是磁带测量

    Example 5
    ::例5

    What tool would you use to measure the height of a floor lamp?
    ::您使用什么工具测量地板灯的高度 ?

    First, look at the object or picture it in your mind.
    ::首先,看看那个物体 或者想象一下它在你的脑海中。

    Next, think about what unit of measurement you would use to measure the object. A floor lamp is usually around the height of an average person, so we could consider feet, yards or meters for measuring.
    ::接下来,想想用什么单位测量物体。 地板灯通常在平均人的高度左右, 所以我们可以考虑用脚、 码或米来衡量。

    Then, choose a tool that would measure these units. This particular object can be measured with either a rigid or flexible measuring tool. Feet and yards are measured on both a yard stick and a tape measure, and meters are measured on meter sticks and most tape measures. Any of these three tools would be appropriate to measure the lamp.
    ::然后选择一个测量这些单位的工具。 这个特定对象可以用一个硬度或弹性度量工具来衡量。 脚和院子用院杆和磁带测量, 米用米棒和大多数磁带测量。 这三个工具中的任何一个都适合测量灯具 。

    The answer is tape measure, yard stick or meter stick.
    ::答案是磁带测量、院杆或仪表棒。

    Review
    ::回顾

    Choose the appropriate measurement unit for each item listed below.
    ::为以下所列每一项目选择适当的测量单位。

    1. A grub collected from the garden
      ::从花园里收集的一小块食物
    2. The width of a street
      ::街道的宽度
    3. The length of a street
      ::街道的长度
    4. The size of a small worm
      ::小蠕虫的大小
    5. The distance from one town to the next
      ::从一个镇到下一个镇的距离

    Choose the appropriate tool to measure each item in metrics and customary units.
    ::选择适当的工具,以量度和习惯单位衡量每个项目。

    1. The height of a light switch
      ::灯光开关的高度
    2. The width of a refrigerator
      ::冰箱宽度
    3. The measurements of a placemat
      ::地垫测量
    4. The length of a pencil
      ::铅笔长度
    5. The width of a chapter book
      ::章节书的宽度
    6. The length of a table cloth
      ::表布的长度
    7. An eyelash
      ::眼睫毛
    8. The length of an ant
      ::蚂蚁的长度
    9. The width of a piece of paper
      ::一张纸的宽度
    10. A television screen
      ::电视屏幕