Ответ:

1)

\(1.26 \cdot \frac{10}{27} : 0.84 - \frac{5}{6}\)

\(1.26 : 0.84 = 1.5 = \frac{3}{2}\).

\(\frac{3}{2} \cdot \frac{10}{27} - \frac{5}{6} = \frac{5}{9} - \frac{5}{6} = \frac{10}{18} - \frac{15}{18} = -\frac{5}{18}\).

2)

\(\frac{64}{155} \cdot 4.65 : 0.18 + 1\frac{1}{3}\)

\(4.65 : 0.18 = \frac{465}{18} = \frac{155}{6}\).

\(\frac{64}{155} \cdot \frac{155}{6} + \frac{4}{3} = \frac{64}{6} + \frac{4}{3} = \frac{32}{3} + \frac{4}{3} = 12\).

Ответ: 1) \(-\frac{5}{18}\); 2) 12.