§ Задание 7
\[\boxed{\mathbf{7}\mathbf{.}}\]
\[15 + 4 = 19 < 20\]
\[15 + 8 = 23 > 20\]
\[49 + 3 = 52 > 50\]
\[46 + 3 = 49 < 50\]
\[84 + 4 = 88 < 90\]
\[84 + 8 = 92 > 90\]
\[\boxed{\mathbf{7}\mathbf{.}}\]
\[15 + 4 = 19 < 20\]
\[15 + 8 = 23 > 20\]
\[49 + 3 = 52 > 50\]
\[46 + 3 = 49 < 50\]
\[84 + 4 = 88 < 90\]
\[84 + 8 = 92 > 90\]