Ответ:
а)
\(2\frac{5}{6}+3\frac{3}{4}-4\frac{1}{2}=\frac{35}{6}+\frac{15}{4}-\frac{9}{2}=\frac{61}{12}\).
\(\frac{61}{12}\cdot0,6+2,75=\frac{61}{12}\cdot\frac{3}{5}+\frac{11}{4}=\frac{61}{20}+\frac{55}{20}=\frac{116}{20}=5,8\).
б)
\(11,825:2,2=5,375\).
\((1\frac{1}{3}+1\frac{1}{6})\cdot1,35=(\frac{4}{3}+\frac{7}{6})\cdot\frac{27}{20}=\frac{5}{2}\cdot\frac{27}{20}=3,375\).
\(5,375-3,375=2\).
Ответ: а) 5,8; б) 2.
