Topic outline

    • Addition and Subtraction of Decimals

      Steps to Add Decimals

      Step1. Change all decimal fractions/decimal numbers into like decimal fractions.

      Step2: Arrange all the decimal fractions in columns according to their place values in such a way that decimal points come in line.

      Step3: Now add.

       

      Example: Add 3.1 and 0.48

      Step1: Change into like decimal fractions.

      Here, the greatest number of decimal places is two.

      3.1 has 1 decimal place, we will add one 0 after 1 and so, 3.1 is written as 3.10

      0.48 already has two decimal places.

      Step2: Arrange all the decimal fractions in columns according to their place values in such a way that decimal points come in line.

           




      Steps to Subtract Decimals

      Follow same steps as in addition

      Example: Solve 8 – 2.34

      Step1: Change into like decimal fractions.

      Here, the greatest number of decimal places is two.

      8 has no decimal place, we will add two zero after putting decimal point so, 8 is written as 8.0

      2.34 already has two decimal places.



      Step2: Arrange all the decimal fractions in columns according to their place values in such a way that decimal points come in line.(write greater decimal fraction on the top)


          

          

       

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