§ Задание 206
\[\boxed{\mathbf{1}\mathbf{.206}}\]
\[\textbf{а)}\ 60 + 40 = 100\ :2 =\]
\[= 50 - 30 = 20\ :5 = 4 \cdot 9 = 36.\]
\[\textbf{б)}\ 70 - 50 = 20 \cdot 5 = 100\ :20 =\]
\[= 5 + 55 = 60\ :30 = 2.\]
\[\boxed{\mathbf{1}\mathbf{.206}}\]
\[\textbf{а)}\ 60 + 40 = 100\ :2 =\]
\[= 50 - 30 = 20\ :5 = 4 \cdot 9 = 36.\]
\[\textbf{б)}\ 70 - 50 = 20 \cdot 5 = 100\ :20 =\]
\[= 5 + 55 = 60\ :30 = 2.\]