\[\boxed{\mathbf{1}\mathbf{.154}}\]
\[1)\ (2786 + 886)\ :8 = 459\]
\[2)\ (3967 + 965)\ \ :9 = 548\]
\[3)\ (2012 - 968)\ :12 = 87\]
\[4)\ (2213 - 897)\ :14 = 94\]
\[5)\ 38 \cdot 43 - 134 = 1634 - 134 =\]
\[= 1500\]
\[6)\ 47 \cdot 26 - 122 = 1222 - 122 =\]
\[= 1100\]