Ответ:

а) \(2\frac{1}{8}+3\frac{5}{12}=\frac{17}{8}+\frac{41}{12}=\frac{51}{24}+\frac{82}{24}=\frac{133}{24}=5\frac{13}{24}\).

б) \(8-3\frac{6}{7}=8-\frac{27}{7}=\frac{56}{7}-\frac{27}{7}=\frac{29}{7}=4\frac{1}{7}\).

в) \(7\frac{5}{8}-3\frac{3}{6}=\frac{61}{8}-\frac{7}{2}=\frac{61}{8}-\frac{28}{8}=\frac{33}{8}=4\frac{1}{8}\).

г) \(1\frac{3}{25}+0.34-\frac{4}{25}=1.12+0.34-0.16=1.30=1.3\).

д) \(7\frac{2}{6}-6.2+2\frac{5}{12}=\frac{22}{3}-\frac{31}{5}+\frac{29}{12}=\frac{440-372+145}{60}=\frac{213}{60}=3\frac{11}{20}\).

Ответ: а) \(5\frac{13}{24}\); б) \(4\frac{1}{7}\); в) \(4\frac{1}{8}\); г) \(1.3\); д) \(3\frac{11}{20}\).