Section outline

  • 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. Find as many ways as you can to make the product 3.6. Later in this section, you will see what dividing decimals together looks like.
    ::使用交互式的区块来查看相加的形状。 找到尽可能多的方法来制作3. 6 。 稍后在本节中, 您将会看到小数点之间的差别是什么样子 。

    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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    1.

    Use the interactive to multiply the following decimals:
    ::使用交互方式乘以以下小数点:

    2.5 x 2.8 =
    ::2.5 x 2. 8 = 输入您的回答

    3.5 x 1.1 =
    ::3. 5 x 1. 1 = 输入您的回答

    1.7 x 1.7 =
    ::1. 7 x 1. 7 = 输入您的回答

    1.1 x 3.5 =
    ::1. 1 x 3. 5 = 输入您的回答

    3.3 x 3.9 =
    ::3.3 x3.9 = 输入您的答复

     

     

     

     

    How can you divide decimals with blocks?
    ::您如何将十进制数和区块数除以 ?

    lesson content
    Dividing with Decimals in the Tenths and Hundredths Place

    Use the blocks in the interactive to divide numbers with digits in the hundredths place by numbers with digits in the tenths place. Then answer the questions below.
    ::使用交互的区块将数字和数字在千位中除以十位中的数字。然后回答下面的问题。

    INTERACTIVE
    Dividing Decimals with Blocks
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    • Drag the slider to adjust one of the numbers in the expression.
      ::拖动滑块以调整表达式中的数字之一。
    • Click the arrow buttons to change the number you are dividing by.
      ::单击箭头按钮以更改您所分隔的数字。
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    How can you  show decimal division with blocks?
    ::您如何用区块显示小数分数 ?

    lesson content
    Dividing Decimals

    Use the blocks in the interactive to divide decimal values.  Notice which value is greater and which is less and whether the greater value is dividing or being divided. Then answer the questions below.
    ::使用互动中的区块来分隔小数点值。 注意哪个值更大, 哪个值较小, 更大的值是分割还是被分割。 然后回答下面的问题 。

    INTERACTIVE
    Decimal Division with Blocks
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    Drag the red dots to create division statements using decimals.
    ::拖曳红色点以使用小数点创建分割语句。

    • Drag the slider to adjust the width of the block
      ::拖动滑滑器以调整块的宽度
    • Drag the corner of the rectangle to adjust the area of the block.
      ::拖曳矩形的角以调整区块的区域。
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    How can you use blocks to divide even smaller decimals?
    ::您如何使用区块分隔小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小于小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小

    lesson content
    Dividing Small Decimals

    Use the interactive to divide decimals with many digits and see what the quotients look like.
    ::使用交互方式将十进制数和许多位数除以,然后看看商数长什么样。

    INTERACTIVE
    Dividing by Decimals
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    • Use the sliders to increase the size of the grid.
      ::使用滑动器来增加网格的大小 。
    • See how each slider effects the equation.
      ::看看每个滑块是如何影响方程的。
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    Discussion Question
    ::讨论问题

    Compare the two division statements.
    ::比较两个分部的报表。

    • 0.00075 ÷ 0.025 = 0.03  
    • 0.0005 ÷ 0.025 = 0.02  

    In the first statement, the number of digits to the right of the decimal in 0.00075 is equal to the sum of the number of digits to the right of the decimals in 0.025 and 0.03. Why is it that in the second statement, the number of digits to the right of the decimal in 0.0005 is NOT equal to the sum of the number of digits to the right of the decimals in 0.025 and 0.02?
    ::在第一个语句中,小数右对面的位数在0.0075时等于小数数对小数右对面的位数在0.025和0.003时的和。 为什么在第二个语句中,小数右对面的位数在0.0005时的位数不等于小数对小数右面的数数对面的和,在0.025和0.02时的位数对面数对面的和?

      Summary
    • Number blocks can be used to divide multi digit decimals.
      ::数字块可用于分隔数位数小数。