\[Стр.\ 43.\]
\[\boxed{\mathbf{8.}}\]
\[1)\ 4478 - 1598 = 2880\]
\[2)\ 28 \cdot 270 = 7560\]
\[3)\ 2880\ :144 = 20\]
\[4)\ 20 \cdot 105 = 2100\]
\[5)\ 7560 + 2100 = 9660\ \]
\[\boxed{\mathbf{9.}}\]
\[78\ м = 7800\ см;\]
\[7800 = 4800 + 3000;\]
\[4800\ :12 = 240\ (кусков) -\]
\[по\ 12\ см.\]
\[3000\ :15 = 200\ (кусков) -\]
\[по\ 15\ см.\]
\[Ответ:240\ кусков\ и\ 200\ кусков.\]