\[\boxed{\mathbf{1.}}\]
\[208 - (72 - 29) = 208 - 43 =\]
\[= 165\]
\[(900 - 570)\ :2 = 330\ :2 = 165\]
\[70 \cdot 5\ :2 = 350\ :2 =\]
\[= 175\ (вычеркнуть)\]
\[340\ :2 - 5 = 170 - 5 = 165\]
\[80 \cdot 3 - 65 = 240 - 65 =\]
\[= 175\ (вычеркнуть)\]
\[35 \cdot 5 - 10 = 175 - 10 = 165\]
\[\boxed{\mathbf{2.}}\]
\[Лариса\ не\ успеет\ в\ кино.\]
\[\boxed{\mathbf{3.}}\]
\[9 \cdot (6 + 24) = 270\]
\[(170 \cdot 5 + 50)\ :10 = 90\]