\[\boxed{\ \mathbf{453\ (453)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 32\ 596\ 800\ :10 = 3\ 259\ 680\]
\[2)\ 876\ 900\ :100 = 8769\]
\[3)\ 240\ 000\ :10\ 000 = 24\]
\[4)\ 450\ 000\ :150 =\]
\[= 45\ 000\ :15 = 3000\]
\[5)\ 36\ 000\ :12\ 000 = 36\ :12 =\]
\[= 3\]
\[6)\ 124\ 360\ 000\ :40\ 000 =\]
\[= 12\ 436\ :4 = 3109\]
\[\boxed{\ \mathbf{453}.}\]
\[(a + 253) \cdot 7 < (9864 - a)\ :4\]
\[a = 124:\]
\[(124 + 253) \cdot 7 < (9864 - 124)\ :4\]
\[377 \cdot 7 < 9740\ :4\]
\[Неверно:\]
\[2639 > 2435.\]