\[\boxed{\mathbf{Страница}\mathbf{\ 63}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{13}\mathbf{.}\mathbf{\ }}\]
\[47 \cdot 2 \cdot 5 = 47 \cdot 10 = 470\]
\[25 \cdot 6 \cdot 4 = 6 \cdot 100 = 600\]
\[60 \cdot 15 \cdot 4 = 60 \cdot 60 = 3600\]
\[12 \cdot 8 \cdot 5 = 8 \cdot 60 = 480\]
\[58 \cdot 6 + 58 \cdot 4 = 58 \cdot (6 + 4) =\]
\[= 58 \cdot 10 = 580\]
\[50 \cdot 78 \cdot 2 = 78 \cdot 100 = 7800\]
\[(45 + 50) \cdot 2 = 90 + 100 = 190\]
\[20 \cdot 32 \cdot 5 = 32 \cdot 100 = 3200\]
\[\boxed{\mathbf{14}\mathbf{.}\mathbf{\ }}\]
\[1)\ 4570 + 23\ 505 =\]
\[= 28\ 075\ (учебников) - всего.\]
\[2)\ 28\ 075\ :5 = 5615\ (пачек) -\]
\[всего.\]
\[3)\ 5615 - 4897 = 718\ (пачек) -\]
\[осталось\ в\ типографии.\]
\[Ответ:718\ пачек.\]
\[\boxed{\mathbf{15}\mathbf{.}\mathbf{\ }}\]
\[50\ 000 - 6 = 49\ 995 - 1\]
\[349\ 800\ :100 = 34\ 980\ :10\]
\[506\ 000 + 1000 < 507\ 100\]
\[503 \cdot 8 < 530 \cdot 8\]
\[451 \cdot 3 < 451 \cdot 6\]
\[130 \cdot 10 > 130\ :10\]
\[\boxed{\mathbf{16}\mathbf{.}\mathbf{\ }}\]
\[700 \cdot 10\ :1000 = 7000\ :1000 =\]
\[= 7\]
\[80 \cdot 90\ :100 = 7200\ :100 = 72\]
\[12\ 000\ :100\ :40 = 120\ :40 = 3\]
\[40 \cdot 60\ :24 = 2400\ :24 = 100\]
\[60 \cdot 60\ :900 = 3600\ :900 = 4\]
\[450\ :10\ :15 = 45\ :15 = 3\]
\[\boxed{\mathbf{17}\mathbf{.}\mathbf{\ }}\]