\[\boxed{\mathbf{35.}}\]
\[\textbf{а)}\ 30 - 2 \cdot 2 = 30 - 4 = 26\]
\[50 - 2 \cdot 3 = 50 - 6 = 44\]
\[100 - 2 \cdot 4 = 100 - 8 = 92\]
\[2 \cdot 6 + 70 = 12 + 70 = 82\]
\[70 - 2 \cdot 7 = 70 - 14 = 56\]
\[60 + 2 \cdot 9 = 60 + 18 = 78\]
\[\textbf{б)}\ 90 - 3 \cdot 4 = 90 - 12 = 78\]
\[5 \cdot 3 + 80 = 15 + 80 = 95\]
\[100 - 4 \cdot 4 = 100 - 16 = 84\]