Найдите сумму: 3 3/4+4/5.

\[3\frac{3^{\backslash 5}}{4} + \frac{4^{\backslash 4}}{5} = 3\frac{15}{20} + \frac{16}{20} =\]

\[= 3\frac{31}{20} = 4\frac{11}{20}.\]