2 5/8:(6:3 3/7)+5 1/6 =

[latex]2 \frac{5}{8} :(6: 3\frac{3}{7} ) +5 \frac{1}{6} = 6\frac{2}{3} [/latex] [latex]1)6: 3 \frac{3}{7} = 6: \frac{24}{7} =6* \frac{7}{24} = \frac{7}{4} =1 \frac{3}{4} =1,75[/latex] [latex]2) 2 \frac{5}{8} :1,75= \frac{21}{8} :1,75=2,625:1,75=1,5[/latex] [latex]3)1,5+ 5\frac{1}{6} = \frac{15}{10} + \frac{31}{6} = \frac{3}{2} + \frac{31}{6} = \frac{9+31}{6} = \frac{40}{6} = \frac{20}{3} =6 \frac{2}{3} [/latex]