Subtraction of Decimals


 
 
Concept Explanation
 

Subtraction of Decimals

Subtraction of Decimals: Subtraction of decimals is carried out in a similar way.  We line up the decimals vertically, tack on extra zeros to the right, and subtract downward.  More specifically, follow the steps below.

Step 1:  Line up the numbers vertically so that the decimal points all lie on a vertical line.

Step 2:  Add extra zeros to the right of the number so that each number has the same number of digits to the right of the decimal place.

Step 3:  Subtract the numbers as you would whole numbers.  Place the decimal point of the result in line with the other decimal points.

Example: Subtract  93.59 - 4.7

Solution:

  • 93.59    Notice the decimal points in line.  4.7 
  • 93.59        We added this 0 so both numbers have 2 digits to the right  4.70         of the decimal point.
  •  small  93.59 -underline{4.70} 88.89
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    Sample Questions
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    Question : 1

    Difference of 99.999 and 100 is

    Right Option : C
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    Explanation
    Question : 2

    The sum of two numbers is 31.021. If one of them is 11.56, then the other number is

    Right Option : A
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    Explanation
    Question : 3

    By how much is frac{19}{20} greater than frac{2}{20}?

    Right Option : C
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    Explanation
     
     


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