Ответ:
\[3\frac{5}{12}+1\frac{5}{6}-2.75=\frac{41}{12}+\frac{22}{12}-\frac{11}{4}=\frac{63}{12}-\frac{33}{12}=\frac{30}{12}=2\frac{1}{2}.\]
Ответ: \(2\frac{1}{2}\).
\[3\frac{5}{12}+1\frac{5}{6}-2.75=\frac{41}{12}+\frac{22}{12}-\frac{11}{4}=\frac{63}{12}-\frac{33}{12}=\frac{30}{12}=2\frac{1}{2}.\]
Ответ: \(2\frac{1}{2}\).