\[\boxed{\mathbf{291\ (291)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ (18 + 20) \cdot 8 = 38 \cdot 8 = 304\]
\[2)\ (128 - 29)\ :11 = 99\ :11 =\]
\[= 9\]
\[3)\ (15 \cdot 6)\ :(15 - 6) = 90\ :9 =\]
\[= 10\]