\[\boxed{\mathbf{2.}}\]
\[1)\ 17 + 5 \cdot 0 = 17 + 0 = 17\]
\[2)\ 24 \cdot 1 + 39 = 24 + 39 = 63\]
\[3)\ 8 \cdot 0 + 45 \cdot 1 + 58 =\]
\[= 0 + 46 + 58 = 104\]
\[\boxed{\mathbf{3.}}\]
\[1)\ 561 \cdot 5 \cdot 2 = 561 \cdot 10 = 5610\]
\[2)\ 25 \cdot 349 \cdot 4 = 100 \cdot 349 =\]
\[= 34\ 900\]
\[3)\ 8 \cdot 416 \cdot 125 = 1000 \cdot 416 =\]
\[= 416\ 000\]
\[\mathbf{13.2.\ Умножение\ многозначных\ чисел}\]
\[\boxed{\mathbf{1.}}\]
\[\boxed{\mathbf{2.}}\]
\[1)\]
\[2)\]
\[3)\]
\[4)\]
\[5)\ \]