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Addition and Subtraction of Decimals

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Addition and Subtraction of Decimals - Lesson Summary

To add or subtract decimal numbers, make sure that the decimal points of the given numbers are placed exactly one below another. While adding or subtracting two decimal numbers, the number of digits after the decimal point should be equal. In case they are not equal, the gaps must be filled with zeros after the last digit.

e.g.

To add 6.82 and 5

First insert zeros in the empty places after the decimal point so that both the numbers have the same number of digits after the decimal point. Next, write the numbers such that their decimal points are one below another.

6.82 + 5 = 11.82

   6.82
+ 5.00
  11.82

To subtract  5 from  6.82

First insert zeros in the empty places after the decimal point so that both the numbers have the same number of digits after the decimal point. Next, write the numbers such that their decimal points are one below another.

e.g. 6.82 - 5 = 1.82

   6.82
5.00
   1.82

Addition or subtraction should be carried out from the extreme right side. Place the decimal point correctly after performing the addition or subtraction. 

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