To add Like Fractions, we add the numerators and write the sum over the same denominator.
To add Unlike Fractions, first we have to change the Unlike Fractions, into equivalent Like Fractions, and then add the two equivalent Like Fractions
Example on Addition of Like Fractions
Question:
Find the sum of 
Explanation:
Sum of Like Fraction =
Sum of Like Fraction =
Sum of Like Fraction =
Hence, the sum of
On Simplifying further,
HCF of 6 and 12 is 6
Dividing both Numerator and Denominator by their HCF i.e, 6
Hence, the sum of
Example on Addition of Unlike Fractions
Question:
Find the sum of 
Explanation:
In order to add Unlike Fraction
Firstly, we have to change the Unlike Fraction, into equivalent Like Fractions, and then add the two equivalent Like Fractions
LCM of 12 and 6 is 12
Converting the Unlike Fraction into Equivalent Like Fraction
We have to multiply , both the numerator and denominator of 
We have to multiply , both the numerator and denominator of 
Now 
On Simplifying further,
HCF of 9 and 12 is 3
Dividing both Numerator and Denominator by their HCF i.e, 3
Hence, the sum of
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