Section outline

  • How can you add decimals with blocks?
    ::您如何用区块添加小数 ?

    lesson content
    Adding Decimals

    Use the interactive to add  whole numbers and decimal values like 11, 4.6 or 10.53. What is the largest value you can make?
    ::使用互动来添加整个数字和小数点值, 如 11, 4.6 或 10.53。 您能够做的最大的值是什么 ?

     

    INTERACTIVE
    Base Ten Blocks
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    Each big, square block counts as 1.
    Each long block counts as 0.1.
    Each small, square block counts as 0.01.

    ::每个大区块计为1. 每个长区块计为0.1. 每个小区块计为0.01

    • Move the red points to change the number of ones, tenths, and hundredths blocks.
      ::移动红点以改变1、10、100个区块的数目。
    • Observe how the changing values affects the total.
      ::观察变化中的数值如何影响总量。
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    How can you multiply decimals with blocks?
    ::您如何用区块乘以十进制 ?

    lesson content
    Multiplying Decimals

    Use the blocks in the interactive to see what together looks like. Then answer the questions below.
    ::然后回答下面的问题。

     

    INTERACTIVE
    Multiplying Decimals with Blocks
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    • Drag the red points to see how to multiply decimals using blocks.
      ::拖曳红色点以查看如何使用区块乘以小数。
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    How can you multiply hundredths with blocks?
    ::你怎么能乘以百分百 与街区?

    lesson content
    Multiplying Decimals to the Hundredths Place

    Use the blocks in the interactive to see what multiplying hundredths together looks like. Then answer the questions below.
    ::然后回答下面的问题。

     

    INTERACTIVE
    Multiplying Hundredths with Blocks
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    • Drag the red points to see how to multiply hundredths using blocks.
      ::拖曳红色点以查看如何使用区块乘以百分百 。
    • Press the button to zoom in and out and see the squares.
      ::按下按钮放大和放大,然后看到方形。
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    How can you use blocks to multiply together even smaller decimals?
    ::您如何使用区块将小于小于小于十进制的位数乘在一起 ?

    lesson content
    Multiplying Small Decimals

    Use the interactive below to multiply together decimals with many digits and see what the products look like. 
    ::使用下面的交互效果将十进制数乘以多个位数,然后看看产品长什么样。

     

    INTERACTIVE
    Using Blocks to Multiply Smaller Decimals
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    • Drag the red points to see how to multiply small decimals using blocks.
      ::拖曳红色点以查看如何使用区块乘以小小数小数。
    • Press the button to zoom in and out and see the squares.
      ::按下按钮放大和放大,然后看到方形。
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      Summary
    • Number blocks can be used to multiply multi digit decimals.
      ::数字块可用于乘以数位数小数。
    • It may be helpful to multiply your numbers together without decimals first and then include the decimal place afterwards. Be sure to count the decimal places of the product carefully!
      ::最好先将您的数字乘在一起,而不先以小数位数计算,然后在后面加上小数位数。 请务必仔细计算产品的小数位数!