\[\boxed{\text{258\ (258).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[90 \cdot 6 = 540\]
\[900 \cdot 6 = 5400\]
\[9000 \cdot 6 = 54\ 000\]
\[810\ :9 = 9\]
\[8\ 100\ :9 = 900\]
\[81\ 000\ :9 = 9\ 000\]
\[140 - 9 \cdot 5 = 140 - 45 = 95\]
\[150 - 7 \cdot 8 = 150 - 56 = 94\]
\[160 - 8 \cdot 8 = 160 - 64 = 96\]
\[88\ :22 \cdot 10 = 4 \cdot 10 = 40\]
\[77\ :11 \cdot 100 = 7 \cdot 100 = 700\]
\[96\ :32 \cdot 1000 = 3 \cdot 1000 =\]
\[= 3000\]