Add the following rational numbers:

(i) and


(ii) and


(iii) and


(iv) and


(i) Clearly,

Denominators of the given numbers are positive


The L.C.M of denominator 7 and 7 is 7


We have,


+


=


=


(ii) Clearly,


Denominators of the given numbers are positive


The L.C.M of denominator 4 and 4 is 4


We have,


+


=


=


= -2


(iii) Clearly,


Denominators of the given numbers are positive


The L.C.M of denominator 11 and 11 is 11


We have,


+


=


=


(iv) Clearly,


Denominators of the given numbers are positive


The L.C.M of denominator 13 and 13 is 13


We have,


+


=


=


2
1