\[\boxed{\mathbf{725\ (725).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 7^{2} = 49\]
\[2)\ {0,4}^{2} = 0,16\]
\[3)\ {1,2}^{2} = 1,44\]
\[4)\ \left( \frac{1}{3} \right)^{2} = \frac{1}{9}\]
\[5)\ \left( 2\frac{2}{9} \right)^{2} = \left( \frac{20}{9} \right)^{2} = \frac{400}{81} = 4\frac{76}{81}\]