(a) In the above diagram, it can clearly be observed that:

In the 1^st and 2^nd rectangle there are 1 and 2 shaded portions out of 5 equal parts respectively

Also, the third rectangle represents 3 shaded portions out of 5 equal parts

Therefore,

The fraction represented by the third rectangle is the sum of fraction represented by 1^st and 2^nd rectangle

Hence,

=

(b) In the above diagram, it can clearly be observed that:

In the 1^st and 2^nd circle there are 5 and 3 shaded portions out of 5 equal parts respectively

Also, the third circle represents 2 shaded portions out of 5 equal parts

Therefore,

The fraction represented by the third circle is the difference of fraction represented by 1^st and 2^nd circle

Hence,

=

(c) In the above diagram, it can clearly be observed that:

In the 1^st and 2^nd rectangle there are 2 and 3 shaded portions out of 6 equal parts respectively

Also, the third rectangle represents 5 shaded portions out of 6 equal parts

Therefore,

The fraction represented by the third rectangle is the sum of fraction represented by 1^st and 2^nd rectangle

Hence,

=