Ответ:

1) \(−0.76+0.44=−0.32\), \(2\frac{2}{3}=\frac{8}{3}\).

\[−0.32:\frac{8}{3}=−0.32\cdot\frac{3}{8}=−0.12\]

2) \(3\frac{5}{14}=\frac{47}{14}\), \(2\frac{3}{4}=\frac{11}{4}\).

\[\frac{47}{14}−\frac{11}{4}=\frac{94−77}{28}=\frac{17}{28}\]

\[\frac{17}{28}\cdot(−3)=−\frac{51}{28}=−1\frac{23}{28}\]

Ответ: 1) −0,12; 2) −1 23/28.