Perpuluhan Muat Turun

  • If the first digit to the right of the place value involved is 5 or more, add 1 to the digit in the place value involved and replace all the other digits on its right with zeros.

  • Every digit in a decimal has its own place value. The place value of each digit in decimals can be shown using a place value chart.



    The number shown in the place value chart above is read as zero point two six.

    1. Addition of decimals is the process of finding the sum of two or more decimals.

    2. In the addition of decimals, arrange the decimals vertically according to their place values.
      Example:

      12.402 + 1.308 =13.71



    3. Subtraction of decimals is the process of finding the difference between two decimals.

    4. In the subtraction of decimals, arrange the decimals vertically according to their place values.
      Example:

      12.072 – 1.929 = 10.143

    5. In mixed operations involving addition and subtraction of decimals, calculation is done from left to right.
      Example:

      1. 1. 8 – 2.56 + 1.783 – 1 =

        Answer:

        8 – 2.56 + 1.783 – 1 = 6.223

    1. To multiply a decimal by 10, 100 or 1 000, move the decimal point 1,2 or 3 places to the right respectively.
      Example:

      6.02 x 10 =



    2. To division a decimal by 10, 100 or 1 000, move the decimal point 1,2 or 3 places to the left respectively.
      Example:

      256.7 /100 =


    3. When a decimal multiplied with 10 or 100, the decimal point is moved to the right. When a decimal divided by 10 or 100, the decimal point is moved to the left (depending on the number of zeros).
      Example:
      1. 47 000 m x 10 =____________km
      2. 0.39 km x 100 = m
      3. 950 m / 10 =___________km
      4. 2.75 km / 100 =________m
    4. Solutions:




    1. To change a proper fraction of tenths to a percentage, convert it to fraction of hundredths.

    2. To change a proper fraction to a percentage, we can also multiply it by 100%.
      Example:
      Convert 1/2 to a percentage.


    3. To change a percentage to a decimal or vice versa, express it as a fraction of hundredths. Then, convert it to decimal or percentage.
      Example:
      Convert 0.33 to a percentage.

      0.33 = 33/100 = 33%