Ответ:
\(7\frac{11}{16}=\frac{123}{16}\), \(3\frac{4}{8}=3\frac{1}{2}=\frac{56}{16}\).
\(\left(\frac{123}{16}-\frac{56}{16}\right)\cdot4=\frac{67}{16}\cdot4=\frac{67}{4}=16\frac{3}{4}\).
Ответ: \(16\frac{3}{4}\).
\(7\frac{11}{16}=\frac{123}{16}\), \(3\frac{4}{8}=3\frac{1}{2}=\frac{56}{16}\).
\(\left(\frac{123}{16}-\frac{56}{16}\right)\cdot4=\frac{67}{16}\cdot4=\frac{67}{4}=16\frac{3}{4}\).
Ответ: \(16\frac{3}{4}\).