Given data:
(a)
The given expression is 5/3+ 5/3 +5/3.
The given expression can be written as,

Thus, the value of the first expression is 5.
(b)
The given expression is 13/5 +13/5.
The given expression can be written as,

Thus, the value of the given expression is 26/5.
(c)
The given expression is 9/4+9/4+9/4.
The given expression can be written as,

Thus, the value of the given expression is 27/4.