§ Задание 29
\[\boxed{\mathbf{29.}}\]
\[17 + 0 = 17\]
\[67 + 0 = 67\]
\[0 + 34 = 34\]
\[0 + 50 = 50\]
\[20 - 0 = 20\]
\[42 - 0 = 42\]
\[5 - 5 = 0\]
\[75 - 75 = 0\]
\[\boxed{\mathbf{29.}}\]
\[17 + 0 = 17\]
\[67 + 0 = 67\]
\[0 + 34 = 34\]
\[0 + 50 = 50\]
\[20 - 0 = 20\]
\[42 - 0 = 42\]
\[5 - 5 = 0\]
\[75 - 75 = 0\]