\[\boxed{\ \mathbf{447\ (447)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[243 \cdot 425 = 103\ 275\]
\[1)\ 103\ 275\ :243 = 425\]
\[2)\ 103\ 275\ :425 = 243\]
\[\boxed{\mathbf{447}.\ }\]
\[1)\ Не\ всегда:\]
\[2 \cdot 2 = 4;\]
\[2 + 2 = 4.\]
\[1 \cdot 2 = 2;\]
\[1 + 2 = 3.\]
\[2)\ Верно.\]
\[3)\ Верно.\]