\[\boxed{\mathbf{4.56.}\mathbf{ОК\ ГДЗ - домашка\ на\ }5}\]
\[\textbf{а)}\ 96\ :24 = 4 + 36 = 40 \cdot 4 =\]
\[= 160 + 640 = 800\ :100 = 8\]
\[\textbf{б)}\ 53 - 23 = 30 \cdot 8 =\]
\[= 240 - 40 = 200\ :4 =\]
\[= 50\ :25 = 2\]