6) 3 2/15 + 1 21/36

\(3\frac{2}{15}+1\frac{21}{36}=4+\frac{2}{15}+\frac{7}{12}=4+\frac{8}{60}+\frac{35}{60}=4\frac{43}{60}\).

Ответ: \(4\frac{43}{60}\).