\[\boxed{\ \mathbf{1180\ (1180)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ (34,56 + 7,94) \cdot 0,1 =\]
\[= 42,5 \cdot 0,1 = 4,25\]
\[2)\ (42,3 - 5,4) \cdot \frac{5}{6} =\]
\[= 36,9\ :6 \cdot 5 = 6,15 \cdot 5 = 30,75\]
\[3)\ 12,5 \cdot 1,6 \cdot 0,36 = 7,2\]
\[4)\ 14,4\ :0,01 \cdot \frac{7}{12} =\]
\[= 1440\ :12 \cdot 7 = 120 \cdot 7 = 840\]
\[\boxed{\mathbf{1180}\mathbf{.}\mathbf{\ }}\]