3. Addition and Subtraction of Fractions

Addition and Subtraction of fractions

 Adding like fractions

  In case of like fractions, the denominator is same so we can add them fluently.

  Steps to add like fractions-

Add the numerators.

 Leave the common denominator same. (Do not add the denominator).

 Write the answer as

 Example

Answer

Solutions:

Subtracting like fractions

  Steps to subtract the like fractions-

 Subtract the small numerator from the bigger one.

 Leave the common denominator same.

Write the answer as

Example:

Solution:

 Adding unlike Fraction

  Still, first we have to find the Equivalent bit of the given fractions with the same denominator then add them, if we have to add the unalike fractions.

  Steps to add unlike fractions-

  Take the LCM of the denominator of the given fractions.

  Find the Equivalent fractions of both fractions with LCM as the denominator.

 Add them as such like fractions.

Example

Take the LCM of 5 and 8, which are 40.

Subtracting unlike Fractions

Steps to subtract unlike fractions-

Take the LCM of the denominator of the given fractions.

Find the Equivalent fractions of both fractions with LCM as the denominator.

Subtract them as such like fractions.

Example

 Answer

LCM of 4 and 5 is 20.

 Comment:  To add or abate the mixed fractions, simply convert them in the improper bit then add and abate them directly

 Mixed fraction,