§ Задание 4
\[\boxed{\mathbf{4}\mathbf{.}}\]
\[1)\ 3 + 3 + 3 + 3 + 3 + 3 + 3 =\]
\[= 21\]
\[3 \cdot 7 = 21\]
\[2)\ 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 =\]
\[= 16\]
\[2 \cdot 8 = 16\]
\[\boxed{\mathbf{4}\mathbf{.}}\]
\[1)\ 3 + 3 + 3 + 3 + 3 + 3 + 3 =\]
\[= 21\]
\[3 \cdot 7 = 21\]
\[2)\ 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 =\]
\[= 16\]
\[2 \cdot 8 = 16\]