\[\boxed{\mathbf{Вариант\ 2.}}\]
\[\boxed{\mathbf{1.}}\]
\[803 = 800 + 3\]
\[80\ 305 = 80\ 000 + 300 + 5\]
\[803\ 007 = 800\ 000 + 3000 + 7\]
\[\boxed{\mathbf{2.}}\]
\[1)\ 200\ 000 + 56 = 200\ 056\]
\[17\ 000 + 2000 + 4 = 19\ 004\]
\[2)\ 25\ 819 + 1 = 25\ 820\]
\[10\ 000 - 1 = 9\ 999\]
\[\boxed{\mathbf{3.}}\]
\[600\ 400 > 60\ 400\]
\[49\ 683 < 50\ 003\]
\[857\ 129 < 875\ 129\]
\[315\ 980 > 315\ 890\]
\[\boxed{\mathbf{4.}}\]
\[Увеличить\ в\ 100\ раз:\]
\[5 \Longrightarrow 5000;\]
\[80 \Longrightarrow 80\ 000;\]
\[900 \Longrightarrow 900\ 000.\]
\[Уменьшить\ в\ 1000\ раз:\]
\[6000 \Longrightarrow 6;\]
\[91\ 000 \Longrightarrow 91;\]
\[316\ 000 \Longrightarrow 316.\]
\[\boxed{\mathbf{5.}}\]
\[5*\ < *5*\]
\[99 > 999*\]
\[*6* < **\]