[tex]11\frac{7}{8}-\frac{3}{4}+3\frac{5}{6}=11\frac{7}{8}-\frac{6}{8}+3\frac{5}{6}=11\frac{7-6}{8}+3\frac{5}{6}=11\frac{1}{8}+3\frac{5}{6}=11\frac{3}{24}+3\frac{20}{24}=14\frac{23}{24}[/tex].

Пошаговое объяснение:

11 7/8 - 3/4 + 3 5/6 =

11 21/24 - 18/24 + 3 5/6 =

11 3/24 + 3 5/6 = 14 8/6 = 15 2/6 = 15 1/3