11) 8 7/8 − 5 3/4 =

\(\frac{3}{4}=\frac{6}{8}\).

\(8\frac{7}{8}-5\frac{3}{4}=3+\frac{7}{8}-\frac{6}{8}=3\frac{1}{8}\).

Ответ: \(3\frac{1}{8}\)