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