З) (2,314 − 1/4) : 1/50 + (1 11/16 + 0,7125) : 3

Преобразуем десятичные дроби:

\(2,314=\frac{1157}{500}\), \(0,7125=\frac{57}{80}\).

\(2,314-\frac{1}{4}=\frac{1157}{500}-\frac{125}{500}=\frac{1032}{500}=\frac{258}{125}\).

\(\frac{258}{125}:\frac{1}{50}=\frac{258}{125}\cdot50=\frac{516}{5}\).

\(1\frac{11}{16}+0,7125=\frac{27}{16}+\frac{57}{80}=\frac{135}{80}+\frac{57}{80}=\frac{192}{80}=\frac{12}{5}\).

\(\frac{12}{5}:3=\frac{4}{5}\).

\(\frac{516}{5}+\frac{4}{5}=\frac{520}{5}=104\).

Ответ: \(104\).